Dell PowerEdge RAID Controller 6i - Manual (Page 49)

Installing and Configuring Hardware
49
Transferring a TBBU Between Controllers
The TBBU provides uninterrupted power supply to the memory module for
up to 72 hours (for a 256 MB of controller cache memory) backup power and
up to 48 hours (for a 512 MB cache) if power supply is unexpectedly
interrupted while cached data is still present. If the controller fails as a result
of a power failure, you can move the TBBU to a new controller and recover
the data. The controller that replaces the failed controller must be devoid of
any prior configuration.
Perform the following steps to replace a failed controller with data in the
TBBU:
1 Perform a controlled shutdown on the system in which the PERC 6/E is
installed, as well as any attached storage enclosures.
2 Remove the controller that has the TBBU currently installed from the
system.
3 Remove the TBBU from the controller.
4 Insert the TBBU into the new controller.
See "Replace the cover of the system. For more information on closing the
system, see your system’s Hardware Owner’s Manual." on page 45.
5 Insert the new controller into the system.
See the relevant sections on installing controllers under "Installing the
PERC 6/E and PERC 6/i Adapters" on page 41.
6 Turn on the system.
The controller flushes the cache data to the virtual disks.
Dell_PERC6.1_UG.book Page 49 Wednesday, April 15, 2009 4:18 PM