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Note: Before using this information and the product it supports, be sure to read the general information in “Safety” on page xiii and “Notices” on page 197. First Edition (July 2009) © Copyright International Business Machines Corporation 2009.
Contents Figures ............................ i x T ables ............................ x i Safety ............................ xiii About this document ...................... x i x Who should read this document .................. x i x How this document is organized .
Power and site wiring requirements ............... 2 3 Heat output, airflow , and cooling ................. 2 4 Chapter 2. Installing the storage subsystem ............. 2 7 Installation overview ....................... 2 7 Handling static-sensitive devices .
Host-agent (in-band) management method ............. 8 0 Direct (out-of-band) management method ............. 8 1 Connecting hosts to the DS5020 using Fibre Channel host ports ..... 8 2 Fibre Channel and iSCSI connections ............... 8 4 Fibre Channel host loop configurations .
Parts listing .......................... 1 6 0 Appendix A. Records ..................... 1 6 3 Identification numbers ...................... 1 6 3 Storage subsystem and controller information record .......... 1 6 4 Sample information record .........
Index ............................ 2 1 3 Contents vii.
viii IBM System Storage DS5020 Storage Subsystem: Installation, User ’s, and Maintenance Guide.
Figures 1. DS5020 hot-swap drive bays ........................... 7 2. Back view; controllers with two standard Fibre Channel host expansion channels ....... 1 0 3. Back view; controllers with two standard and two optional Fibre Channel host expansion channels 10 4.
51. Ethernet and serial port locations on DS5020 .................... 7 9 52. Host-agent (in-band) managed storage subsystems .................. 8 0 53. Direct (out-of-band) managed storage subsystems .................. 8 2 54. Location of host cables on RAID controllers on the DS5020 .
T ables 1. Where to find DS5020 and DS4000-family installation and configuration procedures ...... x x 2. DS5020 weights ............................... 2 0 3. DS5020 component weights ........................... 2 0 4. DS5020 shipping carton dimensions .
xii IBM System Storage DS5020 Storage Subsystem: Installation, User ’s, and Maintenance Guide.
Safety The caution and danger statements that this document contains can be referenced in the multilingual IBM ® Safety Information document that is provided with your IBM System Storage ™ DS5020 Storage Subsystem. Each caution and danger statement is numbered for easy reference to the corresponding statements in the translated document.
Statement 1: DANGER Electrical current from power , telephone, and communication cables is hazardous. T o avoid a shock hazard: v Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration of this product during an electrical storm.
Statement 2: CAUTION: When replacing the lithium battery , use only an equivalent type battery recommended by the manufacturer . If your system has a module containing a lithium battery , replace it only with the same module type made by the same manufacturer .
Class 1 Laser Product Laser Klasse 1 Laser Klass 1 Luokan 1 Laserlaite Apparell Laser de Calsse 1 À IEC 825-1 1993 CENELEC EN 60 825 Statement 4: ≥ 18 kg (39.
Statement 8: CAUTION: Never remove the cover on a power supply or any part that has the following label attached. Hazardous voltage, current, and energy levels are present inside any component that has this label attached. There are no serviceable parts inside these components.
Cable W arning: W ARNING: Handling the cord on this product or cords associated with accessories sold with this product, will expose you to lead, a chemical known to the State of California to cause cancer , and birth defects or other reproductive harm.
About this document This document provides instructions for installing and customizing the configuration of your IBM System Storage DS5020 storage subsystem.
DS5020 and DS4000-family storage subsystem installation tasks - General overview For educational information about the DS5020 and other IBM System Storage products, go to http://ibmdsseriestraining.com/. T able 1 provides a sequential list of many installation and configuration tasks that are common to most DS5020 and DS4000-family configurations.
T able 1. Where to find DS5020 and DS4000-family installation and configuration procedures (continued) Installation task Where to find information or procedures 2 Mount the DS5020 storage subsystem in.
T able 1. Where to find DS5020 and DS4000-family installation and configuration procedures (continued) Installation task Where to find information or procedures 4 Route the storage expansion unit Fibr.
T able 1. Where to find DS5020 and DS4000-family installation and configuration procedures (continued) Installation task Where to find information or procedures 8 Zone the fabric switch (SAN-attached .
T able 1. Where to find DS5020 and DS4000-family installation and configuration procedures (continued) Installation task Where to find information or procedures 16 Configure arrays and logical drives .
2. Click the link for your storage subsystem (for example, DS5020 ). 3. When the subsystem support page opens, click the Download tab. 4. Under the Download tab, click Storage Manager , firmware, HBA, tools, support & pubs (including readmes) . 5.
Premium feature activation Activate a DS5020 or DS4000 premium feature by using the online tool: http://www-912.ibm.com/PremiumFeatures/jsp/keyInput.jsp IBM publications center Find IBM publications: http://www .
Fire suppression systems A fire suppression system is the responsibility of the customer . The customer’s own insurance underwriter , local fire marshal, or a local building inspector , or both, should be consulted in selecting a fire suppression system that provides the correct level of coverage and protection.
xxviii IBM System Storage DS5020 Storage Subsystem: Installation, User ’s, and Maintenance Guide.
Chapter 1. Introduction This chapter describes the operating specifications, features, and components for the IBM System Storage DS5020 Storage Subsystem (hereafter referred to as DS5020 or storage subsystem ).
storage management, copy service options, and optional advanced disaster recovery functions are available for the DS5020, including FlashCopy ® , V olumeCopy , and Enhanced Remote Mirroring. The DS5020 supports up to four hosts in a redundant direct-attached Fibre Channel configuration.
Contact your IBM sales representative or reseller for more information about the various DS5020 and options. Operating system support For supported operating systems, see the latest DS Storage Manager.
– RAID controllers (2) – AC power supply and fan units (2) – Fiber-optic cables (2) – Battery units (2) – Power cables (2 rack jumper line cords) – Diagnostic wrap plug/coupler (1) – Ser.
– Box ID labels (used to label the enclosure IDs on the front of the DS5020) Note: If you ordered additional premium features or entitlements, the premium features activation or entitlement kits might also be shipped inside the box. If an item is missing or damaged, contact your IBM reseller or your IBM marketing representative.
Note: Do not overload the circuits that power your storage subsystem and storage expansion enclosures. Use additional pairs of ac power distribution units (PDUs) if necessary . Refer to for information about storage subsystem power requirements. Contact your IBM service representative for additional information if needed.
Enhanced Disk Drive Modules (E-DDMs) The hot-swap drive bays that are accessible from the front of your storage subsystem are shown in Figure 1. The DS5020 supports both Fibre Channel (FC) and SA T A E-DDMs intermixed in the storage subsystem drive chassis.
Using non-supported E-DDM options or FRUs will result in the E-DDM being locked out by the DS5020 controller firmware and might also damage the drive connector in the enclosure midplane. Attention: 1. After you remove an E-DDM CRU, wait 70 seconds before replacing or reseating the E-DDM CRU to allow it to properly spin down.
Connectors, switch, and enclosure ID The controllers support fiber-optic interfaces for both the host channel and drive channel ports. The controllers also contain two Ethernet ports for storage subsystem management purposes and a serial port that IBM Support uses to perform problem recovery and troubleshooting procedures.
Controller B Controller A Fibre Channel host channels Ethernet por ts Serial por t Enclosure ID Dual-por ted drive channel Enclosure ID Ethernet por ts Serial por t Dual-por ted drive channel Fibre Channel host channels Figure 2.
Setting up IP addresses for DS5020 storage controllers After you install DS Storage Manager (as described in the DS Storage Manager Installation and Support Guide for your host operating system), comp.
2. Start the DS Storage Manager client software. The Enterprise Management window opens. 3. Add the DS5020 subsystem to the Enterprise Management domain using the IP address of the host that has Fibre Channel connectivity to the DS5020. 4. In the Enterprise Management window , click on the name of the default storage subsystem.
6. In the Change Network Configuration window , click on the Controller A and Controller B tabs and type the new TCP/IP addresses in their applicable fields. Click OK . 7. Close the Subsystem Management window , wait at least five minutes, then delete the default DS5020 storage subsystem entry in the Enterprise Management window .
Figure 6 shows a power supply and fan unit and the airflow through the storage subsystem. Battery units Statement 2: Figure 6. Power supply and fan unit and airflow 14 IBM System Storage DS5020 Storag.
CAUTION: When replacing the lithium battery , use only an equivalent type battery recommended by the manufacturer . If your system has a module containing a lithium battery , replace it only with the same module type made by the same manufacturer . The battery contains lithium and can explode if not properly used, handled, or disposed of.
controller will start a battery learning cycle to determine whether the battery current capacity is sufficient. Data caching starts after the battery is charged to the programmed level. During the battery learn cycle, cache will be active if the battery is in good condition.
The storage subsystem supports a fiber-optic interface for host and storage expansion enclosure connections. Y ou must install a Small Form-factor Pluggable (SFP) module in each interface connector on the controller where a fiber-optic cable is to be installed.
Software and firmware support code upgrades T o enable support for the DS5020, you must make sure that your system software and firmware are the correct versions. T o find the latest DS Storage Manager software, storage subsystem controller firmware, ESM, and NVSRAM firmware, check the firmware readme files.
Y ou must perform this step for each individual controller . T o obtain the drive firmware (and A T A translator card firmware) version: Right-click the Drive icon in the Physical View pane of the Subsystem Management window and select Properties . The Drive Properties window opens and displays the properties for that drive.
the storage subsystem in different configurations. T able 3 lists the weight of each component. T able 2. DS5020 weights Unit Weight Maximum 1 Empty 2 Shipping DS5020 40 kg (88 lb) 16.4 kg (36.1 lb) 52.2 kg (1 15.0 lb) 1 Chassis with all CRUs and 16 drives.
T able 5. T emperature and humidity requirements for storage subsystem when in storage or in transit Condition Parameter Requirement T emperature Storage range -10° - 65° C (14° - 149° F) Maximum .
T able 8 lists the KV A, watts, and Btu calculations. These values assume the power supplies have a 73 percent efficiency and a power factor of 0.99. These tabulated power and heat dissipation values are typical for the storage subsystem.
These levels are measured in controlled acoustical environments according to ISO 7779 and are reported in accordance with ISO 9296. The declared sound power levels indicate an upper limit, below which a large portion of machines operate.
Power cords and receptacles: The storage subsystem ships with two jumper cords used to connect to the rack PDU. Y ou must purchase the power cords that are appropriate for use in a typical outlet in the destination country . See Appendix D, “Power cords,” on page 179 for more information.
1220 mm cold aisle width 2440 mm between center lines of hot and cold aisle Perforated tiles or gratings back back T42 racks T42 racks T42 racks Cold aisle Hot aisle Air conditioner back front front front Airflow Figure 1 1. Example of cold aisle/hot aisle rack configuration Chapter 1.
26 IBM System Storage DS5020 Storage Subsystem: Installation, User ’s, and Maintenance Guide.
Chapter 2. Installing the storage subsystem This chapter provides the information that you need to install the storage subsystem into a rack cabinet. Before you begin the installation, review the safety information in “Safety” on page xiii. “Installation overview” provides an overview of the entire storage subsystem installation process.
5. Before removing the DS5020 from the shipping box, remove the components from the DS5020 chassis to lighten the unit. See “Removing the CRUs” on page 36. 6. Record the serial number , machine type and model number , and RAID controller MAC addresses for your DS5020 storage subsystem in Appendix A, “Records,” on page 163.
13. T urn on the power to the attached storage expansion enclosure and the DS5020 storage subsystem using the procedure described in “Powering on the storage subsystem” on page 95. 14. Install the DS Storage Manager host software on the management workstation (for out-of-band management) or on the host (for in-band management).
Suppor t rails DS5020 Storage subsystem Backup battery unit Controller AC po wer supply and fan unit M5 x 8 mm screws (12) M4 x 8 mm screws (4) Small Form-factor Pluggable transceiv ers (pre-installed.
Attention: The mounting rails, mounting hardware, and line jumper cords might be packed beneath the DS5020 in the shipping box. T o remove these items from the shipping box without first removing the DS5020, open the two long sides of the shipping box.
v Sufficient space to install the storage subsystem v Enough stability to support the weight of the fully configured storage subsystem and associated systems. See “Weight” on page 19 for weight specifications. Make sure that all requirements, such as floor space, air conditioning, and electrical service, have been met.
Use the following templates (Figure 13 and Figure 14 on page 34) to identify the proper locations for inserting M5 screws when mounting the support rails and DS5020 storage subsystem to a rack cabinet. The locations for the M5 screws are highlighted in the templates.
Before installing the DS5020 in a rack cabinet, you must install the rails and rack-mounting hardware that come with your storage subsystem. The DS5020 requires an Electronic Industries Association (EIA) 310-D T ype A 19-inch rack cabinet. The distance between EIA rails, from the front to the rear of the rack, is 60.
1. Make sure that the rack cabinet has already been installed. 2. Make sure that a stabilizer has been correctly attached to the bottom front of the rack to prevent the rack from tipping forward while the DS5020 is being installed. Refer to the installation and service guide, or equivalent, for the rack as required.
v The lip on the rail lines up with the bottom of the storage subsystem (the 0U boundary in Figure 14 on page 34). 5. Using a No. 2 Phillips screwdriver , loosen the two screws on the left support rail that hold the two parts of the rail together . The support rails are marked as left or right.
installed the support rails (as listed in “Installing the support rails” on page 32). Alternately , you can use these instructions to lighten the DS5020 before removing it from the shipping box. The shipping box opens to provide access to the storage subsystem CRUs.
3. Place the controller on a level surface. 4. Repeat step 1 through step 3 for the second controller . Removing an ac power supply and fan unit Statement 5: CAUTION: The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device.
3. Place the power supply and fan unit on a level surface. 4. Repeat step 1 through step 3 for the second power supply and fan unit. Removing an E-DDM Complete the following steps to remove a hot-swap E-DDM: Note: The E-DDM comes installed in a drive tray .
5. Place the E-DDM CRU horizontally on a level surface. Attention: Do not stack E-DDM CRUs on top of one another . Protect the E-DDM CRUs from vibrations or sudden shocks.
4. Secure the storage subsystem. Figure 20 shows how to secure the storage subsystem to the rack. a. Align the front mounting holes on each side of the storage subsystem with the mounting holes on the front of the support rails.
5. Continue with one of the following actions: v If you did remove the DS5020 CRUs before installation (as described in “Removing the CRUs” on page 36), continue with “Replacing the components.” v If you did not remove the DS5020 CRUs before installation, continue with Chapter 3, “Cabling the storage subsystem,” on page 45.
Replacing an ac power supply and fan unit Statement 5: CAUTION: The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord.
along the sides of the power supply and fan unit bay . After the guide pins fit into the notches and power supply and fan unit fits snugly into the slot, push the lever upward or downward 90° depending on whether the power supply fan is inserted in the left or right bay to fully latch it into place.
Chapter 3. Cabling the storage subsystem After the storage subsystem is installed in its permanent location, you must cable it to hosts, drives, and other external devices, depending on your hardware configuration.
Fibre Channel loop and ID settings When you install a hard disk drive in the storage subsystem, the drive tray plugs into a printed circuit board called the midplane . The midplane sets the Fibre Channel loop ID automatically , based on the enclosure ID switch setting and the physical location (bay) of the hard disk drive.
Statement 3: CAUTION: When laser products (such as CD-ROMs, DVD drives, fiber-optic devices, or transmitters) are installed, note the following: v Do not remove the covers. Removing the covers of the laser product could result in exposure to hazardous laser radiation.
Installing SFP modules The DS5020 requires SFP modules. SFP modules convert electrical signals to optical signals that are required for Fibre Channel transmission to and from RAID controllers.
v The operational or redundant loop performance is not affected when you install or remove an SFP module. v Y ou must insert the SFP module into a port before you connect the fiber-optic cable. v Y ou must remove the fiber-optic cable from the SFP module before you remove the SFP module from the port.
3. Remove the protective cap from the SFP port. Save the protective cap for future use. 4. Insert the SFP module into the host port until it clicks into place. See Figure 27. 5. Connect an LC-LC Fibre Channel cable. For information about the LC-LC cable, see “Using LC-LC Fibre Channel cables” on page 51.
v For SFP modules that contain wire tabs, unlock the SFP module latch by pulling the wire latch outward 90°, as shown in Figure 29. 3. With the SFP latch in the unlocked position, extract the SFP module. v For SFP modules that contain plastic tabs, slide the SFP module out of the port.
Connecting an LC-LC cable to an SFP module Complete the following steps to connect an LC-LC Fibre Channel cable to an SFP module: Statement 3: CAUTION: When laser products (such as CD-ROMs, DVD drives, fiber-optic devices, or transmitters) are installed, note the following: v Do not remove the covers.
4. Carefully insert this end of the LC-LC cable into an SFP module that is installed in the DS5020. The cable connector is keyed so it will be inserted into the SFP module correctly . Holding the connector , push in the cable until it clicks into place, as shown in Figure 32.
Removing an LC-LC Fibre Channel cable Complete the following steps to remove an LC-LC Fibre Channel cable: Attention: T o avoid damaging the LC-LC cable or SFP module, make sure that you observe the following precautions: v Press and hold the lever to release the latches before you remove the cable from the SFP module.
In the initial installation of the DS5020, you can add only new storage expansion enclosures to the DS5020 storage subsystem. This means there must be no existing configuration information about the storage expansion enclosures that you want to install.
Overview of steps to connect storage expansion enclosures to a storage subsystem T o connect storage expansion enclosures to the storage subsystem, perform the following steps: Note: The following pro.
1. Follow the instructions in the Installation, User’s, and Maintenance Guide for your DS5000 or DS4000 storage expansion enclosure to set up and mount the storage expansion enclosures. 2. Select a cabling topology appropriate for the number of storage expansion enclosures you will connect to the DS5020.
Important: The DS5020 supports the connection of a maximum of six storage expansion enclosures per redundant drive channel pair . The DS5020 supports one redundant drive channel pair . If you are using fiber-optic cables, install SFP modules into the ports that will receive the cables before installing the cables.
One DS5020 and one storage expansion enclosure If you are cabling one DS5020 storage subsystem to one storage expansion enclosure, Figure 37 shows the correct cabling topology . Note: Figure 37 illustrates the drive channel connections between the DS5020 and the storage expansion enclosures.
One DS5020 and two storage expansion enclosures If you are cabling one DS5020 storage subsystem and two storage expansion enclosures, connect one storage expansion enclosure per controller drive port as shown in Figure 38. Figure 39 on page 61 shows that you can also connect two expansion enclosures together behind a single controller drive port.
Important: Do not cable the DS5020 storage subsystem and two storage expansion enclosures as shown in Figure 39. A storage array with the incorrect storage topology might appear to be functional, but incorrect cabling can potentially have unpredictable results.
One DS5020 and three storage expansion enclosures If you are cabling one DS5020 storage subsystem and three storage expansion enclosures, Figure 40 shows the correct cabling topology . 1A 1B DS5020 P or t 2, drive channel 1 1A 1B 1A 1B 1A 1B P or t 1, drive channel 1 P or t 1, drive channel 2 P or t 2, drive channel 2 1A 1B 1A 1B Figure 40.
One DS5020 and four storage expansion enclosures If you are cabling one DS5020 storage subsystem and four storage expansion enclosures, Figure 41 shows the correct cabling topology .
One DS5020 and up to six storage expansion enclosures If you are cabling one DS5020 storage subsystem and up to six storage expansion enclosures, Figure 42 shows the correct cabling topology .
Figure 43 on page 66 shows a cabling topology that is incorrect because all six storage expansion enclosures are connected to a single drive port of the dual-ported drive channel in each controller .
Important: Do not cable the storage subsystem and storage expansion enclosures as shown in Figure 43. A storage array with the incorrect storage topology might appear to be functional, but incorrect cabling can potentially have unpredictable results.
EXP520s are denoted in the graphic as 1 while the EXP810s are denoted as 2 .) DS5020 storage subsystem and supported storage expansion enclosure drive cabling schemes The DS5020 supports only EXP520 and EXP810 storage expansion enclosures.
1. Do not connect a combination of more than six EXP520 or EXP810 storage expansion enclosures to the two ports of a dual-ported drive channel. Failure to observe this limitation might result in loss of data availability .
13. The DS5020 supports the intermix of SA T A and Fibre Channel E-DDMs within the same drive enclosure. ESM B ESM A EXP810 ESM B ESM A EXP810 First EXP810 storage e xpansion enclosure Last EXP810 sto.
One DS5020 and one EXP520 storage expansion enclosure Figure 46 shows the cabling scheme for one DS5020 storage subsystem and one EXP520 storage expansion enclosure.
One DS5020 and two EXP520 storage expansion enclosures Figure 47 shows the cabling scheme for one DS5020 storage subsystem and two EXP520 storage expansion enclosures behind both ports of a dual-ported drive channel. Perform the following steps to create the cabling scheme shown in Figure 47: 1.
One DS5020 and three or more EXP520 storage expansion enclosures T o connect three or more storage expansion enclosures to a DS5020 storage subsystem, alternately connect a storage expansion enclosure to one of the drive ports of the dual-ported drive channel then connect to the other port until all of the storage expansion enclosures are attached.
4. Connect port 1 of drive channel 2 on the DS5020 to port 1B on the right ESM in EXP520 three. 5. Connect port 1B on the left ESM in EXP520 two to port 1 of drive channel 1 on the DS5020. 6. Connect port 1B on the right ESM in EXP520 two to port 2 of drive channel 2 on the DS5020.
Perform the following steps to create the cabling scheme shown in Figure 49: 1. Connect port 1A on the left ESM in EXP520 one to port 1B on the left ESM in EXP520 three. 2. Connect port 1A on the right ESM in EXP520 three to port 1B on the right ESM in EXP520 one.
5. Connect port 1A on the left ESM in EXP520 two to port 1B on the left ESM in EXP520 four . 6. Connect port 1A on the right ESM in the EXP520 four to port 1B on the right ESM in EXP520 two. 7. Connect port 1B on the left ESM in EXP520 two to port 1 of drive channel 1 on the DS5020.
Perform the following steps to create the cabling scheme shown in Figure 50: 1A 1B DS5020 P or t 2, drive channel 1 1A 1B 1A 1B 1A 1B P or t 1, drive channel 1 P or t 1, drive channel 2 P or t 2, drive channel 2 1A 1B 1B 1A 1B 1A 1B 1A 1B 1B 1A 1B 1B 1A 1A 1A EXP520 one EXP520 two EXP520 three EXP520 four EXP520 five EXP520 six Figure 50.
1. Connect port 1A on the left ESM in EXP520 one to port 1B on the left ESM in EXP520 three. 2. Connect port 1A on the right ESM in EXP520 three to port 1B on the right ESM in EXP520 one. 3. Connect port 1B on the left ESM in EXP520 one to port 2 of drive channel 1 on the DS5020.
Storage expansion enclosure settings This section provides information about storage expansion enclosure settings. For additional detail, refer to the Installation, User’s, and Maintenance Guide for your storage expansion enclosure.
Important: 1. The serial interface ports are intended to be used by service technicians to perform diagnostic operations on the storage subsystem. Incorrect use of the serial port can result in loss of data access and, in some cases, in loss of data.
Storage subsystem management methods Before you configure the storage subsystem, determine which method of storage subsystem management you want to use. Y ou can manage the storage subsystems in either of two ways: host-agent (in-band) management or direct (out-of-band) management.
Direct (out-of-band) management method This method uses Ethernet connections from a management station to each controller . Y ou must install at least one management station. The management station can be the host or a workstation on the Ethernet network.
Connecting hosts to the DS5020 using Fibre Channel host ports The DS5020 supports redundant direct attached connections to up to four hosts. T o Make sure that you have full protection against the los.
the SFP modules of the host bus adapters. Figure 54 shows the location on the RAID controllers of the DS5020 storage subsystem where the host-system cables connect. Note: DS5020 controllers with four Fibre Channel host ports is shown in the following illustration.
For other examples of redundant host configurations, see “Fibre Channel host loop configurations” on page 85. Fibre Channel and iSCSI connections A DS5020 storage subsystem Fibre Channel connection consists of up to four host Fibre Channel loops and a redundant drive Fibre Channel loop.
Fibre Channel host loop configurations Y ou must determine how the host systems will connect to the storage subsystem. Y ou can connect up to four host systems directly to the storage subsystem through Fibre Channel host ports, or you can connect more than four hosts to the Fibre Channel storage subsystem through switches.
In Figure 57, the Fibre Channel switches are connected together via the inter-switch link (ISL) to form a single SAN fabric. In Figure 58, the Fibre Channel switches are connected together via the inter-switch link (ISL) to form a dual SAN fabric. In Figure 59 on page 87, the Fibre Channel switches are not connected together .
Figure 60 shows an example of a two-cluster configuration. iSCSI configurations The DS5020 storage subsystem supports 1 Gbps iSCSI connectivity . Y ou must determine how the host systems will connect to the storage subsystem. The illustrations in the following sections show common iSCSI host system configurations.
Note: The minimum DS5020 configuration is two partitions. The maximum is 128 partitions. Configuration upgrades are available as upgrade options. Contact your IBM reseller or marketing representative for more information.
Figure 63 shows iSCSI and Fibre Channel hosts in a multiple-port configuration. Gigabit Ethernet switch Host system with two iSCSI connectors DS5020 Host system with two iSCSI connectors Ethernet switch Figure 62.
Figure 64 shows an incorrect configuration of a single host with both iSCSI and Fibre Channel connections. Important: Do not cable the storage subsystem and host systems as shown in Figure 64. A storage subsystem with the incorrect storage topology might appear to be functional, but incorrect cabling can potentially have unpredictable results.
Installing the storage subsystem configuration Using the information gathered in the previous sections, install the host systems and host adapters. Notes: 1. See the documentation provided with your host adapters for installation requirements and procedures.
92 IBM System Storage DS5020 Storage Subsystem: Installation, User ’s, and Maintenance Guide.
Chapter 4. Operating the storage subsystem This chapter describes operating procedures for the DS5020. For information about the optimal operation of your system, see “Best practices guidelines” o.
Note: When you upgrade firmware, you must upgrade all client package components to the same release level. For example, if you are upgrading your controller firmware from version 6.x to version 7.x, you must also upgrade your Storage Manager client to version 10.
v Make sure that all ESMs are properly seated. v Make sure that all drives are properly seated. v Make sure that all SFP modules are properly seated. v Confirm Fibre Channel cable loop size. (Although IBM specifications require at least 3-inch cable loops, use 6-inch cable loops or longer .
Note: If the power cords are not connected, turn off both power switches on all modules in the configuration before connecting power cords or turning on the main circuit breakers.
d. Review the status of the configuration components shown in the Subsystem Management window by selecting the applicable component button for each storage subsystem. 8. Are the LEDs indicating normal operation, and is the status Optimal on all the configuration components? v Y es — End of procedure.
http://www .ibm.com/systems/support/storage/disk Before any planned system shutdown or after any system additions, removals, or modifications (including firmware updates, logical drive creations, stor.
of a hard disk drive exceeding its PF As), the Needs Attention LED does not turn on. Only the DS Storage Manager client can detect the failure. For example, the recovery procedure for a Predictive Fai.
http://www .ibm.com/systems/support/storage/disk Always check the readme files that are included with the firmware packages for the most up-to-date information about firmware prerequisites, firmware update instructions, and host I/O restrictions, if any .
6. Check the indicator LEDs on the front and the back of the storage expansion enclosure. A green LED denotes a normal status; an amber LED denotes a hardware fault. 7. Is an amber LED on? v Ye s - Locate and troubleshoot the failed components. See “Checking the LEDs.
T able 12. Power supply and fan unit LEDs LED Normal Status Problem Status Power supply and fan unit power On Off Service Action Allowed (OK to Remove) Off On Service Action Required (Fault) Off On Direct Current Enabled On Of f Front LEDs This section describes the primary LEDs and controls on the front of the DS5020 storage subsystem.
T able 13. Front LEDs and controls LED Normal Status Problem Status Drive Activity LED On (not blinking) - No data is being processed Blinking - Data is being processed Off Drive Fault LED Off Blinkin.
T able 14. Battery unit LEDs LED Normal Status Problem Status Service Action Allowed (OK to Remove) Off On Service Action Required (Fault) Off On Battery Charging Green means on, ready Blinking green .
Hear tbeat LED Diagnostic LED Cache active LED Service action required LED Service action allowed LED Host channel speed - L1 LED Drive channel por t bypass LED Drive channel speed LED Ethernet link activity LED Ethernet link speed LED Host channel speed - L2 LED Figure 69.
T able 15. Rear controller LEDs, controls, and connectors LED Normal Status Problem Status Service Action Allowed (OK to Remove) Off On Service Action Required (Fault) Off On Cache Active On - Data is in cache Off - Caching is turned of f.
T able 15. Rear controller LEDs, controls, and connectors (continued) LED Normal Status Problem Status Ethernet Link Activity On - link established Off - no link established Blinking - activity Not applicable Drive Channel Port Bypass (One LED per port) Note: The drive channel consists of two FC ports.
When you turn on the power to the storage subsystem, the seven-segment LEDs show 88 before the boot firmware starts to run. After the boot code starts ,--i s displayed. When the storage subsystem is operating normally , the numeric display shows the enclosure identification (enclosure ID) of the storage subsystem.
T able 17. Numeric display diagnostic codes (continued) V alue Controller State Description LA Suspended Reserved LB Suspended Host card configuration error LC Suspended Persistent cache backup config.
Statement 5: CAUTION: The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. T o remove all electrical current from the device, ensure that all power cords are disconnected from the power source.
Use the following procedure to turn off power to one or more storage subsystems for a planned shutdown. T o turn off power for an unplanned shutdown, see “Restoring power after an unexpected shutdown” on page 1 12. Before proceeding, use the Storage Manager client to determine the status of the system components and special instructions.
9. T urn off both power switches on the back of each storage expansion enclosure in the configuration. CAUTION: The power switch on the power supply and fan unit does not turn off the electrical current supplied to the device. The DS5020 storage subsystem might also have more than one connection to ac power .
Risk of severe electrical shock – Never turn on the power to any equipment if there is evidence of fire, water , or structural damage. Doing so might cause severe electrical shock 1. After the emergency situation is over or power is restored, visually check the storage subsystem for damage.
Recovering from an overheated power supply and fan unit Each storage subsystem contains two power supply and fan units. Each power supply and fan unit contains a built-in temperature sensor designed to prevent it from overheating.
v Ye s - Go to step 4. v No - Perform the procedure “T roubleshooting the storage subsystem ” on page 100 to verify that the power supplies have shut down because of an overheating problem, and then go to step 4. 4. Stop I/O activity to the storage subsystem and all attached storage expansion enclosures.
10. Check the status LEDs on the front and back of the storage subsystem. a. Note the status of the LEDs on the front and back of each module. A green LED indicates a normal status; amber LEDs indicate a hardware fault. b. Open the Subsystem Management window for the storage array .
If caching is enabled and the Cache Active LED never comes on during I/O activity , it indicates one of the following conditions: v The cache memory from either controller A or controller B has failed. v The cache sizes in controller A and controller B are not the same.
Statement 2: CAUTION: When replacing the lithium battery , use only an equivalent type battery recommended by the manufacturer . If your system has a module containing a lithium battery , replace it only with the same module type made by the same manufacturer .
interruption is caused if you remove the battery from the controller chassis, reset the power to the storage subsystem, or if a storage expansion enclosure or battery overheats.
120 IBM System Storage DS5020 Storage Subsystem: Installation, User ’s, and Maintenance Guide.
Chapter 5. Replacing components This chapter contains information about replacing a controller , E-DDM CRU, power supply and fan unit CRU, battery unit, SFP module, and midplane. Attention: Always replace a failed component as soon as possible. The Recovery Guru menu function in the DS5020 storage subsystem identifies failed components.
The Service Action Allowed status LED automatically turns on or off as conditions change. W ait at least two minutes after you replace each component for the controller to recognize the new component and update the LED status.
5. Unpack the new controller . Save all packing materials in the event you need to return the new controller . 6. Determine whether the replacement controller will serve as controller A or controller .
a. Remove the LC-LC Fibre Channel cable from the SFP module. For more information, see “Handling fiber-optic cables” on page 47. b. Unlock the SFP module latch: v For SFP modules that contain plastic tabs, unlock the SFP module latch by pulling the plastic tab outward 10°, as shown in Figure 75.
125 shows the controller sliding from the storage subsystem chassis. 10. If the new controller does not have the cache battery backup unit already installed, follow the instructions in “Replacing a battery unit” on page 144 to remove the cache backup battery from the existing controller unit and insert it into the new controller CRU.
B controller bay to fully latch it into place. Do not force fit. The controller is designed to prevent it from being inserted into the chassis incorrectly . Attention: Make sure that the levers lock into place in the storage subsystem chassis. c. Repeat step 1 1a on page 125 and step 1 1b on page 125 to replace the second controller .
v Blank trays: A storage subsystem without a full set of E-DDMs (16) contains blank trays in the unused drive bays. Before installing new E-DDMs, you must remove these empty trays. Save the empty trays for future use. Each of the 16 bays must always contain either a blank tray or a hot-swap E-DDM.
v E-DDM CRUs are not interchangeable between the DS5020 and other DS4000 storage subsystems. T able 18. Drive LED activity LED LED state Descriptions Activity LED Flashing green The green LED flashes to indicate Fibre Channel activity to the drive.
3. Determine the bay into which you want to install the E-DDM. 4. Remove the blank tray by doing the following: a. Release the latch on the E-DDM CRU by pressing on the inside of the bottom of the tray handle. b. Lift the closed latch to its open position.
Note: Make sure that the EMC gasket does not snag on the bezel. d. Push the tray handle down until it latches into place. Replacing hot-swap E-DDMs E-DDM problems include any malfunctions that delay , interrupt, or prevent successful I/O activity between the hosts and the E-DDMs in the storage subsystem.
Attention: After you remove an E-DDM CRU, wait 70 seconds before replacing or reseating the E-DDM CRU to allow it to properly spin down. Failure to do so might cause undesired events. 8. Use the DS Storage Manager subsystem management window to verify that the E-DDM is shown in the Storage Subsystem Management window .
v Which RAID level is used on the affected drives. (RAID 0 requires you to replace all the E-DDMs at the same time.) v How much downtime is acceptable as you swap the E-DDMs. v The number of E-DDMs in an array . Replacing E-DDMs one at a time is better suited for arrays consisting of 3 to 5 E-DDMs.
Set the E-DDMs on a dry , level surface away from magnetic fields. Save the packing material and documentation in case you need to return them. 5. Perform the following steps: a. Stop all I/O activity to the storage subsystem and attached storage expansion enclosures.
a. T urn on the power to the supporting devices (for example, Ethernet switches and management stations) before you turn off power to the storage subsystem.
Read all precautionary notes, kit instructions, and other information. Kit instructions often contain the most current information regarding the E-DDMs and their installation, plus upgrade or servicing procedures. Compare the kit instructions with this procedure to determine if you need to modify this procedure.
Note: The Drive fault LEDs might flash intermittently while the E-DDMs spin up. v If the Drive activity LED is off, the E-DDM CRU might not be installed correctly .
CAUTION: Do not change the link rate setting while the storage subsystem is running. Changing the link rate setting while the storage subsystem is running could cause drives to fail. Y ou must power down the storage subsystem and storage expansion enclosures before changing the link rate setting.
If both link rate indicator LEDs are on, the data transfer rate is set for 4 Gbps. If one link rate indicator light is on, the data transfer rate is set for 2 Gbps. Important: Make sure that the link rate for the DS5020 is always set to 4 Gbps. The DS5020 supports only 4 Gbps FC drives.
c. When the procedure is completed, rerun the Recovery Guru to make sure that the problem has been corrected by selecting Recheck in the Recovery Guru.
units in the unit will automatically shut down (an over-temperature condition). If this occurs, you must cool the unit and restart it. See “Restoring power after an unexpected shutdown” on page 1 12. Attention: The fans in the power supply and fan units draw in fresh air and force out hot air .
4. Unpack the new power supply and fan unit. Save all packing material in case you need to return the failed power supply and fan unit CRU. Note: The new power supply and fan unit CRU comes with an instruction sheet and label sheet.
DANGER Electrical current from power , telephone, and communication cables is hazardous. T o avoid a shock hazard: v Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration of this product during an electrical storm.
Attention: The left and right power supply and fan units are seated in the DS5020 chassis in opposite orientations. If you cannot fully insert the power supply and fan unit into the power supply and fan unit bay , flip it 180° and reinsert it. Make sure that the levers lock into place in the storage subsystem chassis.
v Ye s - Select the Recovery Guru toolbar button in the Subsystem Management window and complete the recovery procedure. If a problem is still indicated, contact IBM Customer and T echnical Support. v No - Go to step 20. 20. Create, save, and print a new storage subsystem profile.
1. Use the DS Storage Manager client software to print a storage subsystem profile. 2. Locate the RAID controller that contains the failed battery unit. 3. Check the LEDs on the battery units to determine which of the two battery units has failed. (See “Battery unit LEDs” on page 103.
Attention: This product contains a sealed Lithium Ion battery . Discharged Lithium and Lithium Ion batteries are currently designated to be disposed of in normal trash. However , users should contact their municipal waste disposal facility prior to discarding any used battery in normal trash.
DANGER Some laser products contain an embedded Class 3A or Class 3B laser diode. Note the following. Laser radiation when open. Do not stare into the beam, do not view directly with optical instruments, and avoid direct exposure to the beam.
Attention: Handle and install fiber-optic cables properly to avoid degraded performance or loss of communications with devices. For specific handling guidelines, see “Handling fiber-optic cables” on page 47. 6. Disconnect the interface cables from the SFP module.
Replacing a midplane Statement 5: CAUTION: The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device.
a. Squeeze the latch and pull the lever open 90° (so that the lever is horizontal) to release the power supply and fan unit from the latch. The latch is a coral colored tab on the lever . b. Slowly pull the lever away from the chassis to remove the power supply and fan unit, as shown in Figure 17 on page 39.
≥ 18 kg (39.7 lb) ≥ 32 kg (70.5 lb) ≥ 55 kg (121.2 lb) CAUTION: Use safe practices when lifting. Pull the chassis outward from the front of the rack and remove from the rack.
15. Insert the new front cage plane/midplane by aligning it with the storage subsystem front opening and slowly sliding it into the storage subsystem chassis. Make sure that the front cage frame EMC gaskets do not snag between the frame and chassis. 16.
Chapter 6. Hardware maintenance This chapter contains information to help you solve some of the simpler problems that you might have with your storage subsystem. It contains the problem indicators and error messages along with suggested actions to take to resolve the problem.
T able 20. Symptom-to-FRU index Problem indicator Component Possible cause Possible solutions Amber LED is lit Drive CRU (Drive Fault LED) Note: The green Drive Activity LED might also be lit. Drive failure Replace the failed drive. Note: The amber LED on the drive is also lit if the drive slot has a blank drive tray inserted.
T able 20. Symptom-to-FRU index (continued) Problem indicator Component Possible cause Possible solutions Amber LED is lit (continued) Front panel (Global Summary Fault LED) General machine fault A Fault LED is lit somewhere on the storage subsystem (check for Amber LEDs on CRUs).
T able 20. Symptom-to-FRU index (continued) Problem indicator Component Possible cause Possible solutions All green LEDs are off All CRUs Subsystem power is off Check that all storage subsystem power cables are plugged in and the power switches are on.
T able 20. Symptom-to-FRU index (continued) Problem indicator Component Possible cause Possible solutions One or more green LEDs are off Power supply CRUs Power cable is unplugged or switches are turned off. Make sure that the power cable is plugged in and that the switches are turned on.
T able 20. Symptom-to-FRU index (continued) Problem indicator Component Possible cause Possible solutions Intermittent or sporadic power loss to the storage subsystem Some or all CRUs Defective ac power source or improperly connected power cable Check the ac power source.
T able 20. Symptom-to-FRU index (continued) Problem indicator Component Possible cause Possible solutions Unable to access drives Drives and Fibre Channel loop Incorrect storage subsystem ID settings Make sure that the Fibre Channel optical cables are undamaged and properly connected.
T able 20. Symptom-to-FRU index (continued) Problem indicator Component Possible cause Possible solutions Storage expansion enclosures are not attached to the storage subsystem Storage subsystem The DS5020 does not have the necessary feature options to support the storage expansion enclosures.
T able 21. Parts listing (DS5020 storage subsystem) Index DS5020 storage subsystem CRU P/N 1 Rail kit 41Y5152 2 Battery 59Y5151 3 Controller , 1 GB memory , two standard 8 Gbps FC host ports, two stan.
T able 21. Parts listing (DS5020 storage subsystem) (continued) Index DS5020 storage subsystem CRU P/N 8 E-DDM, 4 Gbps FC, 146.8 GB, 15,000 RPM drive module 40K6823 E-DDM, 4 Gbps FC, 300 GB, 15,000 RP.
Appendix A. Records Whenever you add options to your DS5020, be sure to update the information in this appendix. Accurate, up-to-date records make it easier to add other options and provide needed data whenever you contact your IBM technical support representative.
Storage subsystem and controller information record T able 22 provides a data sheet for recording storage subsystem names, management types, Ethernet hardware addresses, and IP addresses. Make a copy of this table and complete the information for your storage subsystems and controllers.
Sample information record T able 23 shows a sample information record. This network contains storage subsystems that are managed by using both the direct-management and host-agent-management method.
Installed device records Use the following table to record the number of the hard disk drives that you replaced and the corresponding bay number . Attention: If you replace a hard disk drive in the wrong drive bay it might cause a loss of data. T able 24.
Appendix B. Rack mounting templates This appendix provides duplicate copies of the rack mounting templates. If you want to tear out the templates from this document, use these copies rather than those provided in “Installing the support rails” on page 32.
Figure 89. Front rack mounting template 168 IBM System Storage DS5020 Storage Subsystem: Installation, User ’s, and Maintenance Guide.
® 3U 3U 2U 2U 1U 1U 0U 0U Rail assembly (Rear Left) Rail assembly (Rear right) Printed in the U.S.A REAR Rack Mounting T emplate DS5020 Rail mounting guide Figure 90.
170 IBM System Storage DS5020 Storage Subsystem: Installation, User ’s, and Maintenance Guide.
Appendix C. Specifications for non-IBM rack installation The following instructions provide safety requirements and rack specifications for installing DS5000 storage subsystems and DS5000 storage expansion enclosures into non-IBM racks. Note: The information in this section applies to 19–inch racks.
3. There must be an accessible and unambiguous disconnect device for each product in the rack, including any power distribution unit. A disconnect device might consist of either the plug on the power cord (if the power cord is no longer than 1.8 m (6 ft.
There must be no unique maintenance procedures or tools required for service. 1 1. Elevated service installations, where the product(s) to be serviced are installed between 1.5 m and 3.7 m (5 ft. and 12 ft.) above the floor , require the availability of an OSHA- and CSA-approved nonconductive step ladder .
T op view of non-IBM rack specifications dimensions The vertical distance between mounting holes must consist of sets of three holes spaced (from bottom to top) 15.9 mm (0.625 in.), 15.9 mm (0.625 in.), and 12.67 mm (0.5 in.) on center (making each three hole set of vertical hole spacing 44.
2. The rack or cabinet must be capable of supporting an average load of 15.9 kg (35 lb.) of product weight per EIA unit. T op F ront of Rack EIA Hole Spacing 6.75 mm min. 15.9 mm 15.9 mm 15.9 mm 15.9 mm 12.7 mm 12.7 mm Hole Diameter = 7.1 +/- 0.1 mm 450 +/- 0.
For example, a four EIA drawer will have a maximum drawer weight of 63.6 kg (140 lb.). 3. AC or dc power drawers need to be support based on equipment purchased for the rack or cabinet. It is strongly recommended that you use a power distribution unit that meets the same specifications as each unit already installed in the rack.
inlet temperature as specified in the server specifications. The perforations should yield at least 34 percent minimum open area per square inch. Appendix C.
178 IBM System Storage DS5020 Storage Subsystem: Installation, User ’s, and Maintenance Guide.
Appendix D. Power cords For your safety , IBM provides a power cord with a grounded attachment plug to use with this IBM product. T o avoid electrical shock, always use the power cord and plug with a properly grounded outlet.
T able 25. IBM power cords (continued) IBM power cord part number Feature code Description Used in these countries or regions 39Y7917 9820 Power Cord (250v , 10A, 2.
T able 25. IBM power cords (continued) IBM power cord part number Feature code Description Used in these countries or regions 39Y7923 9825 Power Cord (250v , 10A, 2.
182 IBM System Storage DS5020 Storage Subsystem: Installation, User ’s, and Maintenance Guide.
Appendix E. Additional DS5020 documentation For educational information about the DS5020 and other IBM System Storage products, go to http://ibmdsseriestraining.
T able 26. DS Storage Manager V ersion 10 titles by user tasks (continued) Title User tasks Planning Hardware installation Software installation Configuration Operation and administration Diagnosis an.
DS4800 storage subsystem library T able 28 associates each document in the DS4800 storage subsystem library with its related common user tasks. T able 28.
DS4700 storage subsystem library T able 29 associates each document in the DS4700 storage subsystem library with its related common user tasks. T able 29.
DS4500 storage subsystem library T able 30 associates each document in the DS4500 (previously F AStT900) storage subsystem library with its related common user tasks.
DS4400 storage subsystem library T able 31 associates each document in the DS4400 (previously F AStT700) storage subsystem library with its related common user tasks.
DS4300 storage subsystem library T able 32 associates each document in the DS4300 (previously F AStT600) storage subsystem library with its related common user tasks.
DS4200 Express storage subsystem library T able 33 associates each document in the DS4200 Express storage subsystem library with its related common user tasks.
DS4100 Storage subsystem library T able 34 associates each document in the DS4100 (previously F AStT100) storage subsystem library with its related common user tasks.
DS5000 and DS4000 storage expansion enclosure documents T able 35 associates each of the following documents with its related common user tasks. T able 35.
Other DS5000 and DS4000-related documents T able 36 associates each of the following documents with its related common user tasks. T able 36. DS5000 and DS4000-related document titles by user tasks Ti.
194 IBM System Storage DS5020 Storage Subsystem: Installation, User ’s, and Maintenance Guide.
Appendix F . Accessibility This section provides information about alternate keyboard navigation, which is a DS Storage Manager accessibility feature. Accessibility features help a user who has a physical disability , such as restricted mobility or limited vision, to use software products successfully .
T able 37. DS Storage Manager alternate keyboard operations (continued) Short cut Action Alt+ underlined letter Access menu items, buttons, and other interface components by using the keys associated with the underlined letters.
Notices This information was developed for products and services offered in the U.S.A. IBM may not offer the products, services, or features discussed in this document in other countries. Consult your local IBM representative for information on the products and services currently available in your area.
Adobe and PostScript are either registered trademarks or trademarks of Adobe Systems Incorporated in the United States and/or other countries. Cell Broadband Engine is a trademark of Sony Computer Entertainment, Inc., in the United States, other countries, or both and is used under license therefrom.
Some software might differ from its retail version (if available) and might not include user manuals or all program functionality . Particulate contamination Attention: Airborne particulates (includin.
205/A015 3039 E. Cornwallis Road P .O. Box 12195 Research T riangle Park, North Carolina 27709-2195 U.S.A. In the request, be sure to include the publication part number and title.
European Union EMC Directive conformance statement This product is in conformity with the protection requirements of EU Council Directive 2004/108/EC on the approximation of the laws of the Member States relating to electromagnetic compatibility .
IBM verändert bzw . wenn Erweiterungskomponenten von Fremdherstellern ohne Empfehlung der IBM gesteckt/eingebaut werden. EN 55022 Klasse A Geräte müssen mit folgendem Warnhinweis versehen werden: “W arnung: Dieses ist eine Einrichtung der Klasse A.
Glossary This glossary provides definitions for the terminology and abbreviations used in IBM System Storage DS5000 and DS4000 publications. If you do not find the term you are looking for , see the IBM Glossary of Computing T erms located at the following Web site: www .
Standard Architecture (ISA) system bus on the IBM PC A T computer . Equivalent to integrated drive electronics (IDE). auto-volume transfer/auto-disk transfer (A VT/ADT). A function that provides automatic failover in case of controller failure on a storage subsystem.
interface (FC-SCSI) hardware path ID. It is required to be the same for all SCSI targets logically connected to an Fibre Channel adapter . drive channels. The DS4200, DS4700, and DS4800 subsystems use dual-port drive channels that, from the physical point of view , are connected in the same way as two drive loops.
Fibre Channel Protocol (FCP) for small computer system interface (SCSI). A high-level fibre-channel mapping layer (FC-4) that uses lower-level fibre-channel (FC-PH) services to transmit SCSI commands, data, and status information between a SCSI initiator and a SCSI target across the FC link by using FC frame and sequence formats.
(EISA) further expanded the data path to 32 bits. See also Extended Industry Standard Architecture . initial program load (IPL). The initialization procedure that causes an operating system to commence operation. Also referred to as a system restart, system startup, and boot.
logical drive data to verify that it can be accessed, and optionally scans the logical drive redundancy information. medium access control (MAC). In local area networks (LANs), the sublayer of the dat.
Standard Architecture (EISA) bus. ISA and EISA boards plug into an IA or EISA slot, while high-speed PCI controllers plug into a PCI slot. See also Industry Standard Architecture , Extended Industry Standard Architecture . polling delay . The time in seconds between successive discovery processes during which discovery is inactive.
serial A T A. The standard for a high-speed alternative to small computer system interface (SCSI) hard drives. The SA T A-1 standard is equivalent in performance to a 10 000 RPM SCSI drive. serial storage architecture (SSA). An interface specification from IBM in which devices are arranged in a ring topology .
elements must be defined to grant access to host computers and host groups using logical drive-to-LUN mappings. striping. Splitting data to be written into equal blocks and writing blocks simultaneously to separate disk drives. Striping maximizes performance to the disks.
212 IBM System Storage DS5020 Storage Subsystem: Installation, User ’s, and Maintenance Guide.
Index A a hot-swap E-DDM replacing 130 a hot-swap hard disk drive replacing 130 about this document xix ac power cords and receptacles 24 ac power recovery 23 ac power requirements 23 ac power supply .
D data sheet 164 devices, installing and replacing 121 DHCP server sample network 1 1 diagnostic interface port 79 direct management method 81 document organization xix documentation DS Storage Manage.
Health Check process 93 heat dissipation 21 heat output 24 host adapter , connecting to RAID controller 82 host-agent management method 80 hot swap drive bays 7 drive LED activity described 128 hardwa.
power supply and fan units (ac) description 13 power-fan canister recovering from shutdown 1 14 power , restoring after an emergency 1 12 powering off for planned shutdown 109 powering on after planne.
storage subsystem configuration saving 6 storage subsystem configuration, installing 91 storage subsystem profile saving 6 submodel ID 99 support code upgrades software and firmware 18 support notific.
218 IBM System Storage DS5020 Storage Subsystem: Installation, User ’s, and Maintenance Guide.
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Part Number: 49Y0289 Printed in USA (1P) P/N: 49Y0289.
Ein wichtiger Punkt beim Kauf des Geräts IBM DS5020 (oder sogar vor seinem Kauf) ist das durchlesen seiner Bedienungsanleitung. Dies sollten wir wegen ein paar einfacher Gründe machen:
Wenn Sie IBM DS5020 noch nicht gekauft haben, ist jetzt ein guter Moment, um sich mit den grundliegenden Daten des Produkts bekannt zu machen. Schauen Sie zuerst die ersten Seiten der Anleitung durch, die Sie oben finden. Dort finden Sie die wichtigsten technischen Daten für IBM DS5020 - auf diese Weise prüfen Sie, ob das Gerät Ihren Wünschen entspricht. Wenn Sie tiefer in die Benutzeranleitung von IBM DS5020 reinschauen, lernen Sie alle zugänglichen Produktfunktionen kennen, sowie erhalten Informationen über die Nutzung. Die Informationen, die Sie über IBM DS5020 erhalten, werden Ihnen bestimmt bei der Kaufentscheidung helfen.
Wenn Sie aber schon IBM DS5020 besitzen, und noch keine Gelegenheit dazu hatten, die Bedienungsanleitung zu lesen, sollten Sie es aufgrund der oben beschriebenen Gründe machen. Sie erfahren dann, ob Sie die zugänglichen Funktionen richtig genutzt haben, aber auch, ob Sie keine Fehler begangen haben, die den Nutzungszeitraum von IBM DS5020 verkürzen könnten.
Jedoch ist die eine der wichtigsten Rollen, die eine Bedienungsanleitung für den Nutzer spielt, die Hilfe bei der Lösung von Problemen mit IBM DS5020. Sie finden dort fast immer Troubleshooting, also die am häufigsten auftauchenden Störungen und Mängel bei IBM DS5020 gemeinsam mit Hinweisen bezüglich der Arten ihrer Lösung. Sogar wenn es Ihnen nicht gelingen sollte das Problem alleine zu bewältigen, die Anleitung zeigt Ihnen die weitere Vorgehensweise – den Kontakt zur Kundenberatung oder dem naheliegenden Service.
