IBM Redbooks ServeRAID-MR10i, User Manual

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Transferring Cached Data from a Failed Controller 6-13
CAUTION:
The battery is a nickel metal hydride battery. To avoid possible
explosion, do not burn. Exchange only with the IBM-approved part.
Recycle or discard the battery as instructed by local regulations. In
the United States, IBM has a process for the collection of this
battery. For information, call 1-800-426-4333. Have the IBM part
number for the battery unit available when you call. (C007)
6.3 Transferring Cached Data from a Failed Controller
If you are using the ServeRAID-MR10i controller with an iBBU, and if the
controller fails when there is data in the cache that has not been written
to disk, you can save the cached data. To do so, remove the iBBU from
the failed controller and install it on a new controller. To save the data,
the following conditions must be met:
•
The new controller on which you install the iBBU must be the same
model as the failed controller
•
The replacement controller must have a cleared configuration
•
The new controller must be connected to the same drives that the
failed controller was connected to
Follow these steps to use the iBBU to transfer cached data from a failed
controller to a new controller:
Attention: Be sure to ground yourself before you touch the controller
and the iBBU.
1. Shut down the computer, turn off the power, and unplug the power
cords.
2. Remove the cover from the computer according to the instructions in
the system user’s manual so you can access the RAID controller.
3. Ground yourself before you touch the controller.
4. Unplug all cables from the controller, remove the screw attaching the
bracket to the computer case, and carefully remove the failed
controller from the slot.