Cascade Configuration Of Snapshot And Shawdowimage - Hitachi AMS2100 User Manual

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Cascade configuration of SnapShot and ShawdowImage

When the firmware version of the array is 08B0/A or more, SnapShot
and ShadowImage can be cascaded. When SnapShot pair status is
Split, and at the same time, ShadowImage pair status is any of Paired,
Paired Internally Synchronizing, Synchronizing, and Split
Pending, the host I/O performance for the P-VOL deteriorates. Use
ShadowImage in the Split status and, if needed, resynchronize the
ShadowImage pair and acquire the backup. Furthermore, when
cascading TrueCopy, SnapShot, and ShadowImage, if TrueCopy pair
status is Paired, the host I/O performance of the P-VOL may
deteriorate. Operate TrueCopy in the Split pair status, and if needed,
resynchronize the TrueCopy pair and acquire the backup.
5-9
Configuring SnapShot
Hitachi AMS 2000 Family Copy-on-Write SnapShot User Guide