Hewlett Packard Enterprise HPE XP7, User Manual, Page: 126 / 311

Failure during Fast Snap pair restore
During a failure, the storage system does the following:
• Blocks and suspends the Fast Snap pair ("PSUE" status), including pairs that have snapshot data in
the pool.
• Writes data to the Fast Snap pair volumes.
• Exceeds the data pool capacity of snapshot data.
If a failure occurs, delete the unneeded snapshot data by restoring the suspended pairs.
More information
Restoring suspended Fast Snap pairs on page 126
Restoring suspended Fast Snap pairs
NOTE: You can only restore one Fast Snap pair at a time.
Procedure
1. Delete the snapshot data by resynchronizing the pair.
2. Complete one of the following:
• Overwrite the backup data to the P-VOL.
• Format the P-VOL.
For more information about overwriting backup data to the P-VOL or formatting LDEVs, see the HPE
XP7 Provisioning for Open Systems User Guide .
More information
Failure during Fast Snap pair restore on page 126
Resynchronizing Fast Snap pairs on page 127
Fast Snap pair resynchronization
The amount of time required for resynchronization depends on the following, even if the pair
resynchronization rate is 100 percent:
• The amount of capacity the pool is using.
• The number of pairs being resynchronized concurrently.
Pair resynchronization methods
Forward resynchronization
You can use the Normal Copy (Primary > Secondary) method to forward resynchronize pairs.
This method performs a full forward resynchronization of data from the P-VOL to the S-VOL. The
differential data is copied to the S-VOL.
126 Failure during Fast Snap pair restore