HP XP P9500 Storage - Manual (Page 22)

3 Sharing Business Copy volumes
Business Copy volumes can be shared with other HP software product volumes. This chapter
discusses requirements, recommendations, and restrictions for sharing volumes.
Cache Residency
Volumes with Cache Residency settings can be used as Business Copy primary volumes and
secondary volumes.
NOTE: See the bullet on Quick Restore in (page 18) for important information about the operation
and volumes with Cache Residency settings.
Snapshot
Snapshot and Business Copy can share volumes. When pairs are shared, they can be assigned
to consistency groups, though not the same consistency group.
The following table shows how volumes can be shared.
Business Copy volume Snapshot volume
Reserve volume S-VOL P-VOL
No Yes
2
Yes P-VOL
(all statuses except RCPY)
1
No No No V-VOL
No No No Data pool
1. An SS P-VOL in RCPY status cannot be used by BC. See the following tables for more information.
2. The BC pair must be created before the SS pair.
Business Copy pair operations that you can perform are limited according to the Snapshot pair
status. The following sections show the Business Copy operations that can be performed.
Sharing the SS primary volume with the BC primary volume
The following table shows the pair operations allowed when the primary volume is shared with a
Snapshot primary volume.
Snapshot pair status Business Copy operation
PSUE RCPY COPY
2
PSUS, PFUS PAIR, PFUL COPY
1
Yes No Yes Yes Yes Yes Create a pair (paircreate)
Yes No Yes Yes Yes Yes Create and split a pair (paircreate -split)
Yes No Yes Yes Yes Yes Split a pair (pairsplit)
Yes No Yes Yes Yes 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 Yes Yes Yes Yes Yes Suspend a pair operation
22 Sharing Business Copy volumes