Notes on acquiring snapshot data

There are some situations in which acquiring snapshot data might end abnormally.

The raidcom modify snapshot -snapshot_data create CCI command might terminate abnormally, as shown below, if the consistency group includes a pair in a status other than "PAIR."

• The command is rejected.

• Timeout occurs with the error code EX_EWSTOT.

• The pair is suspended with the error code EX_EWSUSE.

If you perform an operation other than pairsplit (for example, deletion of snapshot data or a Thin Image pair) on a pair in the consistency group while the raidcom modify snapshot -snapshot_data create command is running, consistency of snapshot data to be acquired cannot be maintained. Therefore, the raidcom modify snapshot -snapshot_data create command might end abnormally as shown below.

• Timeout might occur with the error code EX_EWSTOT.

• The pair might be suspended with the error code EX_EWSUSE.

Restoring a Thin Image pair might end abnormally in either of the following conditions.

• Snapshot data for a consistency group including the pair is being acquired.

• The primary volume of the pair is also used as the primary volume of another Thin Image pair. In addition, snapshot data for a consistency group including the latter pair is being acquired.