Removal and replacement procedures 42
CAUTION: To prevent improper cooling and thermal damage, do not operate the server unless all
expansion slots have either an expansion slot cover or an expansion board installed.
To replace the component, reverse the removal procedure.
Recovering data from the BBWC
If the server fails, you can recover any data temporarily trapped in the BBWC by using the following
procedure.
CAUTION: Before starting this procedure, read the information about protecting against electrostatic
discharge ("Preventing electrostatic discharge" on page 25).
1. Perform one of the following:
• Set up a recovery server station using an identical server model. Do not install any internal drives
or BBWC in this server. (This option is preferred.)
• Find a server that has enough empty drive bays to accommodate all the drives from the failed
server and that meets all the other requirements for drive and array migration.
2. Power down the failed server ("Power down the server" on page 27). If any data is trapped in the
cache module, the amber LED on the module blinks every 15 seconds.
CAUTION: Do not detach the cable that connects the battery pack to the cache module. Detaching the
cable causes any unsaved data in the cache module to be lost.
3. Transfer the hard drives from the failed server to the recovery server station.
4. Remove the BBWC cache module ("Removing the BBWC cache module" on page 43) and battery
pack ("Removing the BBWC battery pack" on page 42) from the failed server.
5. Perform one of the following:
• Install the BBWC into an empty BBWC DIMM socket on the system board of the recovery server.
• Install the BBWC into an empty BBWC DIMM socket on any Smart Array 641 or 642 controller
in the recovery server.
6. Power up the recovery server. A 1759 POST message appears, stating that valid data was flushed
from the cache. This data is now stored on the drives in the recovery server. You can now transfer
the drives (and controller, if one was used) to another server.
Removing the BBWC battery pack
1. Power down the server (on page 27).
2. Extend or remove the server from the rack ("Extending the server from the rack" on page 26,
"Remove the server from the rack" on page 27).
3. Remove the access panel ("Removing the access panel" on page 28).
CAUTION: To prevent a server malfunction or damage to the equipment, do not add or remove the battery
pack while an array capacity expansion, RAID level migration, or stripe size migration is in progress.
CAUTION: After the server is powered down, wait 15 seconds and then check the amber LED before
unplugging the cable from the cache module. If the amber LED blinks after 15 seconds, do not remove the
cable from the cache module. The cache module is backing up data, and data is lost if the cable is
detached.
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