Monitoring Data Pool Capacity; Monitoring Data Pool Usage - Hitachi AMS 2000 User Manual

Table 9-1: Pair Status Definitions (Continued)
Pair Status
Failure P-VOL pair status changes to Failure if copying from the
P-VOL to the S-VOL can no longer continue. The failure
includes HDD failure and remote path failure that
disconnects the local array and the remote array.
•
pair status at the local array changes from Paired to
Failure.
•
changes from Synchronizing to Failure.
•
differential data.
To recover, remove the cause then resynchronize the
pair.

Monitoring data pool capacity

Monitoring data pool capacity is critical for the following reasons:
• Data copying from the local to remote array will halt when:
- The local data pool's use rate reaches 90 percent
- The remote data pool's capacity is full
Also, the local array could be damaged if data copying is stopped for these
reasons.
This section provides instructions for
•

Monitoring data pool usage

• Specifying the threshold value
• Adding capacity to the data pool
Monitoring data pool usage
To monitor data pool usage level
1. In Navigator 2 GUI, select the desired array, then click the Show &
Configure Array button.
2. From the Replication tree, select the Setup icon. The Setup screen
displays.
3. Select Data Pools. The Data Pools screen displays.
4. Locate the desired data pool and review the % Used column. This
shows the percentage of the data pool's capacity that is being used. Click
the Refresh Information button to make sure the data is current.
If the status becomes Threshold Over, then capacity is more than the
Threshold level. Threshold is set by the user during data pool setup. It is a
percentage of the data pool that, when reached, indicates to you that
maximum capacity is close to being reached. The default Threshold level is
70%.
Hitachi AMS 2000 Family TrueCopy Extended Distance User Guide
Description
Data consistency is guaranteed in the group if the
Data consistency is not guaranteed if pair status
Data written to the P-VOL is managed as
Monitoring and maintenance
Access Access
to P-VOL to S-VOL
Read/
Write
9–5