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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 DS4000 subsystems (see "Product
updates" on page 4).
Attention:
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 DS4200 Express's logical drives. Failure to
observe the limitations, prerequisites, and dependencies in the readme file might
result in a loss of data access.
Unless the readme file contains special requirements for the sequence in which you
upgrade firmware, you should 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 DS4000 Storage Manager is the best way to monitor the storage subsystem,
diagnose a problem, and recover from a hardware failure. You should run the
DS4000 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 DS4000 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
3. Does any component have a Needs Attention status?
4. Select the Recovery Guru toolbar button. Perform the procedure in the
5. Mute the alarm, if needed.
Read the readme file that is included in each firmware or DS4000
storage subsystem, and view the status of each of the components.
The status for each component is either Optimal or Needs Attention.
v Yes - Go to step 4.
v No - All components are Optimal. Go to step 6 on page 88.
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 cycle the power on the DS4000 storage
subsystem and all remaining storage expansion enclosures in the storage
subsystem. Contact IBM Customer and Technical Support before powering off
any attached storage expansion enclosures.
Chapter 4. Operating the storage subsystem
87
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