IBM Redbooks ServeRAID-MR10M, User Manual

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Replacing the Battery Backup Unit 6-13
6.2 Replacing the Battery Backup Unit
For optimal performance, replace the battery backup unit once a year.
See the
Warranty and Support Information document for the replacement
battery part number.
When you install a new iBBU, the battery recharge cycle counter for the
iBBU is automatically set to zero. For instructions on installing the iBBU,
see
Section 5.1, “Installing the iBBU on the ServeRAID-MR10M
Controller.”
CAUTION:
The battery is a lithium ion 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-MR10M 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: