Avago Technologies MegaRAID SATA 150-4 (523) - Manual (Page 82)

3-34 BIOS Configuration Utility and MegaRAID Manager
Version 2.0 Copyright © 2003–2006 by LSI Logic Corporation. All rights reserved.
Step 4. Press ENTER to open the reconstruct menu.
The menu items are RAID level, stripe size, and reconstruct.
Step 5. To change the RAID level, select RAID with the arrow key, and
press ENTER.
Step 6. Select Reconstruct and press ENTER to reconstruct the
logical drive.
Note: After you start the reconstruct process, you must wait until
it is complete. You cannot reboot, cancel, or exit until the
reconstruction is complete.
3.12 Replacing a Failed Controller Containing Data in
the TBBU
The MegaRAID Transportable Battery Backup Module (TBBU) is a cache
memory module with an integrated battery pack. The module provides
an uninterrupted power source to the module if power is unexpectedly
interrupted while there is still cached data present. If the power failure is
the result of the MegaRAID controller itself failing, then the TBBU can be
moved to a new controller and the data recovered. The replacement
controller must have a cleared configuration.
Perform the following steps to replace a failed controller with data in the
transportable battery backup unit.
Step 1. Power-down the system and drives.
Step 2. Remove the failed controller from the system.
Step 3. Remove the TBBU from the failed controller.
Step 4. Insert the TBBU into the replacement controller.
Step 5. Insert the replacement controller into the system.
Step 6. Power-on the system.
The controller then reads the disk configuration into NVRAM
and flush cache data to the logical drives.