There are several considerations to review before servicing
features within the SAS subsystem for the 8231-E2B system.
Attention: Do not attempt to remove any parts related
to the SAS subsystem if the cache data present LED on the card in
either P1-C18 or P1-C13 is flashing. To see this LED, you must shut
down the system and remove the service cover. The LED shows a no-touch
icon (a hand with a slash through it), and indicates that there is
possible data in cache on the adapter. To prevent data loss, first
make sure that the system has been shut down correctly. If either
cache data present LED is flashing, refer to one of the following
topics before removing any SAS subsystem parts. You can safely replace
the cache battery pack when Yes is displayed next
to Battery pack can be safely replaced on the Battery
Information panel (for Linux and IBM® i
systems) or the COMMAND STATUS panel (for AIX® systems).
Before servicing any features, review the I/O configurations for
each logical partition on your system. It is important to understand
the differences between the various configurations and the resulting
service considerations. In addition, consider possible impacts to
the following areas:
- Logical partitions and their I/O adapter assignments
- RAID array configurations
- Physical disk locations
- Path to your boot device
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