POWER7 information

Removing and replacing the cache battery pack

Use this procedure to replace the cache battery pack on a battery card.

Identify the system that you will be working on by using the identify the system process to turn on the system locate (blue) indicator. For more information, see Control panel LEDs and Enabling enclosure indicators.

Attention: Before continuing with this procedures, determine that it is safe to replace the cache battery pack. See Displaying rechargeable battery information. It is safe to replace the cache battery pack when Yes is displayed next to Battery pack can be safely replaced.

Attention: To maintain system availability and prevent possible data loss, it is important to understand that these features have implications on the serial-attached SCSI (SAS) configuration and data accessibility of the system. Review the SAS subsystem topic to understand the various SAS configuration and service considerations.

Before servicing or installing any features, review the I/O configurations for each logical partition on your system. It is important to understand the differences between the various configurations and the resulting service considerations. In addition, consider possible impacts to the following areas:

Logical partitions and their I/O adapter assignments
RAID array configurations
Physical disk locations
Path to your boot device

To replace a nonconcurrent maintainable battery pack, complete the following steps:

Remove the controller from the system. For more information, see the following procedures:
- Removing the 8231-E2B, 8231-E1C, 8231-E1D, 8231-E2C, 8231-E2D, or 8268-E1D RAID/cache storage controller.
- Removing and installing the cache battery card.
Place the controller on a surface that is electrostatic-discharge protected.
Unplug the battery connector (A) from its connector on the adapter, squeezing the retaining latch while gently pulling on the plug. The plug connects to the board in only one way; therefore, it cannot be inserted incorrectly during the replacement procedure.
Note: Ensure that the cache battery pack is disconnected for at least 60 seconds before connecting the new battery. This is the minimum amount of time needed for the adapter to recognize that the battery has been replaced.

Figure 1. Removing the cache battery
- (A) Battery connector
- (B) Cache battery pack
The battery is mounted on a black plastic plate with two tabs, secured by standoffs with retaining pins. To remove the battery assembly, squeeze the retaining pins on one standoff and pull the tab of the black mounting plate up off of the standoff. Repeat this for the second tab.
Install the replacement battery onto the standoffs and push until the latches click into place.
Figure 2. Replacing the cache battery
Reinstall the adapter and restart the cache. For more information, see the following procedures:
- Removing and installing the cache battery card
- Removing the model 8231-E2B, 8231-E1C, 8231-E1D, 8231-E2C, 8231-E2D, or 8268-E1D RAID/cache storage controller
Connect the cache battery pack connector (A) to the adapter. The plug connects to the adapter in only one way; therefore it cannot be inserted incorrectly.

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Last updated: Mon, December 15, 2014