Data retention – HP XP P9500 Storage User Manual
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Snapshot pair status
Business Copy operation
PSUE
RCPY
COPY
2
PSUS, PFUS
PAIR, PFUL
COPY
1
(pairsplit -E)
Yes
Yes
Yes
Yes
Yes
Yes
Delete a pair
(pairsplit -S)
1.
COPY status during initial copy.
2.
COPY status during resynchronization.
3.
2. After executing the pairsplit command on the SS pair, you must confirm that all pairs in the SS consistency group are in
PSUS status before performing the BC operation. This insures that all snapshot data is consistent with primary volume data,
and therefore is ready to use in the BC operation.
4.
3. When the host accesses the SS secondary volume, SS primary volume data may be used. Therefore you cannot perform
the Quick Restore operation in reverse direction to swap the BC primary and secondary volumes.
Sharing the SS primary volume with the BC secondary volume
The following table shows the pair operations allowed when the Business Copy secondary volume
is shared with a Snapshot primary volume.
Snapshot pair status
Business Copy operation
PSUE
RCPY
COPY
2
PSUS, PFUS
PAIR, PFUL
COPY
1
No
No
No
No
No
No
Create a pair (paircreate)
No
No
No
No
No
No
Create and split a pair (paircreate -split)
Yes
No
Yes
Yes
Yes
1
Yes
Split a pair (pairsplit)
Yes
No
Yes
Yes
Yes
1
Yes
Resynchronize a pair (pairresync)
Yes
No
Yes
Yes
Yes
3
Yes
Resynchronize a pair in reverse direction
(pairresync -restore)
No
No
No
No
No
No
Quick resync of a pair in reverse direction
4
(pairresync -restore)
Yes
No
Yes
Yes
Yes
Yes
Suspend a pair operation
(pairsplit -E)
Yes
Yes
Yes
Yes
Yes
Yes
Delete a pair
(pairsplit -S)
1.
COPY status during initial copy.
2.
COPY status during resynchronization.
3.
2. After executing the pairsplit command on the SS pair, you must confirm that all pairs in the SS consistency group are in
PSUS status before performing the BC operation. This insures that all snapshot data is consistent with primary volume data,
and therefore is ready to use in the BC operation.
4.
3. When the host accesses the SS secondary volume, SS primary volume data may be used. Therefore you cannot perform
the Quick Restore operation in reverse direction to swap the BC primary and secondary volumes.
Data Retention
You can create Business Copy pairs using volumes to which the following Data Retention’s access
attributes are set:
•
Read/Write
•
Read Only (Volume)
•
Protect
Data Retention
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