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Removal and replacement procedures 62
1.
Perform one of the following:
o Set up a recovery server station using an identical server model. Do not install any internal drives
or BBWC in this server. (HP recommends this option.)
o 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 26). If any data is stored in the
cache module, a green LED on the module flashes every 2 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. Perform one of the following:
o If the array controller has failed, remove the cache module ("Removing the BBWC cache
module" on page 60) and battery pack ("Removing the BBWC battery pack" on page 61) from
the failed array controller, and install the cache module and battery pack on an array controller
in the recovery server.
o If the server has failed, remove the controller, cache module ("Removing the BBWC cache
module" on page 60), and battery pack ("Removing the BBWC battery pack" on page 61) from
the failed server, and install the controller, cache module, and battery pack in the recovery
server.
5. Power up the recovery server. A 1759 POST message is displayed, 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.
Flash-backed write cache procedures
Two types of procedures are provided for the FBWC option:
• Removal and replacement of failed components:
o Removing the cache module ("Removing the FBWC cache module" on page 62)
o Removing the capacitor pack ("Removing the FBWC capacitor pack" on page 64)
• Recovery of cached data from a failed server ("Recovering data from the battery-backed write
cache" on page 61)
CAUTION: Do not detach the cable that connects the battery pack or capacitor pack to the
cache module. Detaching the cable causes any unsaved data in the cache module to be lost.
Removing the FBWC cache module
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.
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.