HP XP Racks - Manual (Page 74)

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.
Related topics
•
“Performance planning and calibrating your XP7 storage system” (page 16)
74 Monitoring and maintaining Business Copy