Sharing volumes with Thin Image Advanced

ShadowImage User Guide

Version
9.8.7
Audience
anonymous
Part Number
MK-98RD9021-17

You should understand the relationship between Thin Image Advanced pair statuses and ShadowImage operations when the P-VOL of a Thin Image Advanced pair is shared as the P-VOL or an S-VOL of a ShadowImage pair.

Pair tasks with Thin Image Advanced primary volume shared with ShadowImage primary volume

SI task (CCI command) Thin Image Advanced pair task
COPY(PD) PAIR PSUS(SP) COPY(SP) PSUS COPY(RS) COPY(RS-R) SMPL(PD) PSUE
Create a pair (paircreate) YES YES YES YES YES YES NO YES YES
Create and split a pair (paircreate -split) YES YES YES YES YES YES NO YES YES
Split a pair (pairsplit) YES YES YES YES YES YES NO YES YES
Resynchronize a pair (pairresync) YES YES YES YES YES YES NO YES YES
Reverse Copy a pair (pairresync -restore) YES YES* NO YES YES YES NO YES YES
Quick Restore a pair (pairrespync -restore) NO NO NO NO NO NO NO NO NO
Suspend a pair (pairsplit -E) YES YES YES YES YES YES YES YES YES
Delete a pair (pairsplit -S) YES YES YES YES YES YES YES YES YES
*After issuing the raidcom modify snapshot -snapshot_data split command for a Thin Image Advanced pair for which a consistency group is configured, verify that the status of all pairs in the Thin Image Advanced consistency group is PSUS or unpaired, and then execute the SI task. If you do not, the Thin Image Advanced snapshot data and P-VOL data when the VSP 5000 series storage system accepted the raidcom modify snapshot -snapshot_data split command will not be consistent. For details about Thin Image Advanced pair status and operations, see the Hitachi Thin Image Advanced User Guide.

Pair tasks with Thin Image Advanced primary volume shared with ShadowImage secondary volume

SI task (CCI command) Thin Image Advanced pair task
COPY(PD) PAIR PSUS(SP) COPY(SP) PSUS COPY(RS) COPY(RS-R) SMPL(PD) PSUE
Create a pair1 (paircreate) NO NO NO NO NO NO NO NO NO
Create and split a pair (paircreate -split) NO NO NO NO NO NO NO NO NO
Split a pair (pairsplit) YES YES2 NO YES YES YES NO YES YES
Resynchronize a pair (pairresync) YES YES2 NO YES YES YES NO YES YES
Reverse Copy a pair (pairresync -restore) YES YES2 NO YES YES YES NO YES YES
Quick Restore a pair3 (pairrespync -restore) NO NO NO NO NO NO NO NO NO
Suspend a pair (pairsplit -E) YES YES YES YES YES YES NO YES YES
Delete a pair (pairsplit -S) YES YES YES YES YES YES YES YES YES
Notes:
  1. When you use an S-VOL of an SI pair as the P-VOL of a Thin Image Advanced pair, you must create the SI pair first and then create the Thin Image Advanced pair.
  2. After issuing the raidcom modify snapshot -snapshot_data split command for a Thin Image Advanced pair for which a consistency group is configured, verify that the status of all pairs in the Thin Image Advanced consistency group is PSUS or unpaired, and then execute the SI task. If you do not, the Thin Image Advanced snapshot data and P-VOL data when the VSP 5000 series storage system accepted the raidcom modify snapshot -snapshot_data split command will not be consistent. For details about Thin Image Advanced pair status and operations, see the Hitachi Thin Image Advanced User Guide
  3. When the host accesses the Thin Image Advanced S-VOL, the Thin Image Advanced P-VOL data might be used to return a reply. For this reason, you cannot Quick Restore to exchange the SI P-VOL and S-VOL (which is the Thin Image Advanced P-VOL).