Firmware Updates; Checking The Leds - IBM TotalStorage DS4300 Installation, User's, And Maintenance Manual

For example, the recovery procedure for an IBM Predictive Failure Analysis
flag (impending drive failure) on a drive varies depending on the drive status (hot
spare, unassigned, RAID level, current logical drive status, and so on). Depending
on the circumstances, a PFA flag on a drive can indicate a high risk of data loss (if
the drive is in a RAID 0 volume) or a minimal risk (if the drive is unassigned). Only
the storage-management software 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
Recovering from a storage-server failure might require you to perform procedures
other than replacing the component (such as backing up the logical drive or failing a
drive before removing it). The storage-management software gives these
procedures.
Attention:

Firmware updates

In order to ensure the optimal operation of the DS4300 storage subsystem and its
attached storage expansion enclosures, the storage expansion enclosure ESM
firmware, the DS4300 storage subsystem 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:
http://www-1.ibm.com/servers/storage/support/disk/
Apply the necessary updates before configuring the DS4300 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 1).
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 DS4300 storage subsystem's logical drives. Failure
to observe the limitations, prerequisites, and dependencies in the Readme file might
result in a loss of data access.

Checking the LEDs

The LEDs display the status of the storage subsystem and components. Green
LEDs indicate a normal operating status; amber LEDs indicate a possible failure.
It is important to check all the LEDs on the front and back of the storage subsystem
when you turn on the power. In addition to checking for faults, you can use the
LEDs on the front of the storage subsystem to determine if the drives are
responding to I/O transmissions from the host.
For information about the LEDs on the front of the storage subsystem, see the
following:
v Figure 73 on page 98
turn on, so checking the LEDs will not notify you of the failure, even if the
risk of data loss is high.
Not following the software-recovery procedures can result in data loss.
Read the Readme file that is included in each firmware or DS4000
Chapter 4. Operating the storage subsystem
®
(PFA)
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