Filter
Top Products
drive is in a RAID 0 volume) or a minimal risk (if the drive is unassigned). Only the
DS4000 Storage Manager client can identify the risk level and provide the
necessary recovery procedures.
Note: For PFA flags, the General-system-error LED and Drive Fault LEDs do not
turn on, so checking the LEDs will not notify you of the failure, even if the
risk of data loss is high.
Recovering from a storage-server failure might require you to perform procedures
other than replacing the component (such as backing up the logical drive). The
DS4000 Storage Manager client gives these procedures.
Attention: Not following the software-recovery procedures can result in data loss.
In addition, always replace a failing component as soon as possible to minimize
additional failures that might occur, causing loss of data access.
Firmware updates
Attention: Save the storage subsystem profile before performing any controller or
ESM firmware upgrades. Save the DS4500 storage subsystem profile and all
configuration (*.cfg) files to a server disk that will remain accessible in the event of
a DS4000 storage configuration failure. Do not save these files only to a LUN in the
DS4000 Storage Subsystem.
To ensure the optimal operation of the DS4500 and its attached storage expansion
enclosures, the storage expansion enclosure ESM firmware, the DS4500 controller
firmware, the hard drive firmware, and the NVSRAM (for controllers only) must be
up to date. Go to the following Web site to get the latest updates:
www.ibm.com/servers/storage/support/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 DS4000 subsystems (see “Product
updates” on page 4).
Chapter 4. Operating the storage subsystem 125