IBM ServeRAID M5025 User Manual page 40

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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)
Follow these steps to replace a failed controller with data in the
transportable battery backup unit.
Step 1. Review all safety information provided with the server; then,
power down the server and the drives.
Step 2. Remove the failed controller from the system.
Step 3. Remove the iBBU from the failed controller.
Step 4. Insert the iBBU into the replacement controller.
Step 5. Insert the replacement controller into the system.
Step 6. Turn on the power to the system.
The controller then reads the disk configuration into NVRAM
and flushes the cached data to the virtual disks.
ServeRAID M5025 SAS/SATA Controller Hardware Installation