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Removal and replacement procedures 51
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 ("Flash-backed write cache module" on page 51)
o Removing the capacitor pack ("Flash-backed write cache capacitor pack" on page 52)
• Recovery of cached data from a failed server ("Recovering data from the battery-backed write cache"
on page 50)
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.
Flash-backed write cache module
To remove the component:
CAUTION: The cache module connector does not use the industry-standard DDR3 mini-DIMM
pinout. 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.
1. Back up all data.
2. Close all applications.
3. Power down the server (on page 25).
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.
4. Extend the server from the rack (on page 26).
5. Remove the access panel ("Access panel" on page 30).
6. Remove the PCI riser cage ("PCI riser cage" on page 32)
7. If the existing cache module is connected to a capacitor pack, observe the FBWC module LEDs (on
page 100):
o If the amber LED is flashing, data is trapped in the cache. Restore system power, and restart this
procedure from step 1.
o If the amber LED is not illuminated, remove the controller from the server, and then continue with the
next step.