HP XP P9500 Storage - Manual (Page 55)

7 Monitoring and maintenance
This chapter provides information and instructions for monitoring and maintaining the Continuous
Access Synchronous system.
Monitor pair status
Monitoring the Continuous Access Synchronous system is an ongoing operation that should be
performed frequently to keep track of and maintain your pairs.
•
When you want to perform a pair command, first check the pair’s status. Each operation
requires a specific status or set of statuses.
•
Pair status changes when an operation is performed. Check status to see that pairs are
operating correctly and that data is updated from P-VOLs to S-VOLs in the Paired status, or
that differential data management is performed in the Split status.
Monitoring using the GUI is done at the user’s discretion. Monitoring should be repeated frequently.
Email notifications of problems can be set up using the GUI.
Procedure 10 To monitor pair status
1. On the menu bar, click Actions > Remote Copy > Continuous Access Synchronous > Pair
Operation. The Pair Operation window opens.
2. Locate the pair volume with the status you want to review. Review pair status in the Status
column.
You can view more details by right-clicking and selecting Detail.
How pair status changes
The primary system changes and maintains the status of the P-VOL and is responsible for keeping
the P-VOL and its S-VOL synchronized. The remote system maintains the status of the S-VOL.
•
The primary system can change the status of the P-VOL and S-VOL.
•
The secondary system can change the status of the S-VOL but not the P-VOL. When an operation
is performed from the secondary system, the primary system detects a status change in the
S-VOL and then changes P-VOL status accordingly.
•
The status indicates the state of the volume or pair:
A volume that is not assigned to a pair is in SMPL status. ◦
◦ When a pair is started, the secondary system changes the status of the P-VOL and S-VOL
to COPY. When the initial copy operation is complete, the primary system changes the
status of both volumes to PAIR.
◦ When a pair is split by the user, the system changes the status of the P-VOL and S-VOL
to Split.
◦ When a pair is suspended due to an error condition, the primary/secondary system
changes the P-VOL and S-VOL status to Split.
◦ When a pair is deleted by the user from the primary system, that system changes the
status of the P-VOL and S-VOL to SMPL.
◦ When a pair is deleted from the remote system, that system changes the S-VOL status to
SMPL, and the secondary system detects the pair release and changes the P-VOL status
to PSUS.
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