Hitachi AMS2100 User Manual page 46

NOTE: When using SnapShot with ShadowImage
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Hitachi AMS 2000 Family Copy-on-Write SnapShot User Guide
Failure in this table excludes a condition in which access of an LU is
not possible (for example, LU blockage).
When one P-VOL configures a pair with one or more S-VOLs, decide
which item is applied as the pair status of the P-VOL of the above-
mentioned ShadowImage with the following procedure:
- If all the pairs that the P-VOL concerned configures are in the
Split status, the item of Split is applied.
- If all the pairs that the P-VOL concerned configures are in the
Split status or the Failure status, the item of Split is applied.
However, when including the pair that became Failure during
restore, the items of Failure (Restore) are applied.
- If a pair in the Paired status, the Synchronizing status, or the
Reverse Synchronizing status is included in the pair that the P-
VOL concerned configures, the item of Paired, Synchronizing,
and Reverse Synchronizing is applied, respectively.
SnapShot overview