HP XP7 Business Copy User Guide (TK913-96002)

Related topics

• “Histories window” (page 102)

Workflow for maintaining the system

Some maintenance tasks are a response to behavior discovered while monitoring the system. You

complete other tasks to keep the system in tune with your changing requirements.

Use the following workflow to maintain the system:

1. If you discover behavior while monitoring the system, maintain the system.

For more information about maintaining the system, see “Pair user tasks during system and

device maintenance” (page 74).

Pair user tasks during system and device maintenance

Check the following to determine whether pairs and pair user tasks are affected when you perform

maintenance on physical and logical devices:

• To prevent one or more pairs from suspending, perform XP7 cache maintenance during a

period of low I/O usage. Reduce the I/O load before performing cache maintenance.

• You can maintain the physical devices that contain LDEVs used by BC independently of pair

user tasks and pair status. Maintenance does not affect BC.

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

architecture.

• If a physical device failure requires the XP7 storage system to utilize dynamic sparing or

automatic correction copy, the pair status is not be affected.

• If an LDEV failure occurs, the XP7 storage system suspends the pair.

• If an BC pair is using an LDEV, maintenance is restricted. You can block (for maintenance),

format, and restore the LDEV if it is used only by a pair in PSUE status.