Removal and replacement procedures 65
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 65)
o Removing the capacitor pack ("Capacitor pack" on page 67)
o Removing the capacitor pack holder ("Capacitor pack holder" on page 68)
• Recovery of cached data from a failed server ("Recovering data from the flash-backed write cache" on
page 69)
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 31).
2. Remove all power:
a. Disconnect each power cord from the power source.
b. Disconnect each power cord from the server.
3. Do one of the following:
o Extend the server from the rack (on page 32).
o Remove the server from the rack (on page 34).
4. Remove the access panel ("Access panel" on page 37).
5. If the cache module is installed on the system board, remove the PCI riser cage ("PCI riser cage" on
page 57).
CAUTION: When connecting or disconnecting the capacitor pack cable, the connectors on the
cache module and cable are susceptible to damage. Avoid excessive force and use caution to
avoid damage to these connectors.
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