Error state

The cache battery pack should be in an error state before you replace it.

To prevent possible data loss, ensure that the cache battery pack is in an error state before replacing it. This will ensure all cache data is written to disk before battery replacement. Forcing the battery error will result in the following:

The system logs an error.
Data caching becomes disabled on the selected controller.
System performance could become significantly degraded until the cache battery pack is replaced on the selected controller.
The Battery pack can be safely replaced field on the controller rechargeable battery information screen indicates Yes.
Cache data present LED stops flashing.

This error state requires replacement of the cache battery. Ensure that you have the correct type and quantity of cache battery packs to do the replacement. To resume normal operations, replace the cache battery pack.

The cache battery pack for the 572F storage I/O adapter and the 575C auxiliary cache adapter is contained in a single battery field replacement unit (FRU) that is physically located on the 575C auxiliary cache adapter. The functions of forcing a battery pack error and starting the adapter cache on either adapter in the card set results in the same function automatically being performed on the other adapter in the card set.