Removal and replacement procedures 49
o
Low-profile riser board
To replace the component, reverse the removal procedure.
Flash-backed write cache procedures
The following types of procedures are provided for the FBWC option:
• Removal and replacement of failed components:
o Removing the cache module ("FBWC module" on page 49)
o Removing the capacitor pack ("Capacitor pack" on page 50)
o Removing the capacitor pack holder ("Capacitor pack holder" on page 52)
• Recovery of cached data from a failed server ("Recovering data from the flash-backed write cache" on
page 53)
CAUTION: Do not detach the cable that connects the battery pack or capacitor pack to the cache
module. Detaching the cable causes all data in the cache module to be lost.
FBWC module
CAUTION: The cache module connector does not use the industry-standard DDR3 mini-DIMMs.
Do not use the controller with cache modules designed for other controller models, because the
controller can malfunction and you can lose data. Also, do not transfer this cache module to an
unsupported controller model, because you can lose data.
CAUTION: In systems that use external data storage, be sure that the server is the first unit to be
powered down and the last to be powered back up. Taking this precaution ensures that the system
does not erroneously mark the drives as failed when the server is powered up.
To remove the component:
1. Power down the server (on page 28).
2. Remove all power:
a. Disconnect each power cord from the power source.
b. Disconnect each power cord from the server.
CAUTION: In systems that use external data storage, be sure that the server is the first unit to be
powered down and the last to be powered back up. Taking this precaution ensures that the system
does not erroneously mark the drives as failed when the server is powered up.
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