Review the following information about maintenance activities and ShadowImage for Mainframe operations:
- Cache maintenance can reduce overall performance and should be scheduled during times of low system activity.
- Maintenance of physical drives used by ShadowImage for Mainframe volumes can be performed without impacting pair operations.
- 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.
- Certain activities are not allowed for ShadowImage for Mainframe volumes. If you want to block (for maintenance), format, or restore an LDEV that is used by ShadowImage for Mainframe, you must suspend the pair (Suspend/SUSPER status).