System and device maintenance

The following maintenance activities do not affect SI replication pairs:

• Cache maintenance can reduce overall performance and should be scheduled during times of low system activity.

• Maintenance of physical disk drives that provision LDEVs used by SI can be performed without impacting SI.

• If a physical device failure occurs, the pair status is not affected because of the RAID architecture.

• If a physical device failure requires the storage system to use dynamic sparing or automatic correction copy, the pair status is not be affected.

• If an LDEV failure occurs, the storage system suspends the pair.

• If an SI pair is using an LDEV, certain activities are not allowed. You can only block (for maintenance), format, or restore an LDEV that is in use by only a pair in PSUE status.