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.Apply the necessary updates before
configuring the storage subsystem arrays and logical drives. Subscribe to My
Support for automatic notifications of firmware or Storage Manager software
updates or any important information about your storage subsystems (see “Product
updates and support notifications” on page 5).
Attention: Read the readme file that is included in each firmware or DS Storage
Manager software package for any limitations, subsystem firmware prerequisites, or
download-sequence information. For example, the controller firmware code might
require the storage expansion enclosure ESM firmware to be upgraded first to a
particular version, or the controller firmware download might require the halting of
I/Os to the DS5020 logical drives. Failure to observe the limitations, prerequisites,
and dependencies in the readme file might result in a loss of data access. See
“Finding DS5020 and DS4000-family readme files” on page xxiv to learn how to
access the DS5020 readme files on the Web.
Unless the readme file contains special requirements for the sequence in which you
upgrade firmware, perform firmware upgrades in the following sequence:
1. ESM firmware for the storage expansion enclosures
2. Controller firmware
3. Controller NVSRAM
4. Drive firmware
Troubleshooting the storage subsystem
The DS Storage Manager is the best way to monitor the storage subsystem,
diagnose a problem, and recover from a hardware failure. Run the DS Storage
Manager continuously, and frequently check the configuration status.
Use the following procedure to check the status of and identify a problem with the
storage subsystem. If a problem has occurred, use the DS Storage Manager client
software and the LEDs on the storage subsystem to help locate a failed component.
1. Open the Subsystem Management window.
2. Select the component button for each storage expansion enclosure in this
storage subsystem, and view the status of each of the components.
The status for each component is either Optimal or Needs Attention.
3. Does any component have a Needs Attention status?
vYes - Go to step 4.
vNo - All components are Optimal. Go to step 6 on page 101.
4. Select the Recovery Guru toolbar button. Perform the procedure in the
Recovery Guru to correct the problem. The Recovery Guru might direct you to
replace the failed component. If so, go to step 5.
Attention: If the fault requires you to power off an attached storage expansion
enclosure, you might need to reset the power to the DS5020 storage subsystem
and all remaining storage expansion enclosures in the storage subsystem.
Contact IBM Customer and TechnicalSupport before powering off any attached
storage expansion enclosures.
5. If applicable, mute the alarm.
100 IBM System Storage DS5020 Storage Subsystem: Installation, User’s, and Maintenance Guide