HP XP P9500 Storage - Manual (Page 42)

3. In the Suspend Pairs window, type a Task Name and click Apply.
Pair split
Host updates to the P-VOL and periodic copying to the S-VOL continue until the pair is split. After
the pair is split, updates continue to the P-VOL but are not copied to the S-VOL; data in the S-VOL
is ensured at the time of the split. Update data that accrues during the split is stored in differential
bitmaps until it is copied to the S-VOL during resynchronization.
The P-VOL and S-VOL are synchronized when the pair status changes from V-Split/SUSPVS or
SP-Pend/TRANS to Split/SUSPOP.
Related information
•
“Types of split operations” (page 42)
•
“Prerequisite information for splitting pairs” (page 43)
•
“Splitting pairs” (page 43)
•
“Splitting pairs in a consistency group using At-Time Split workflow” (page 44)
Types of split operations
Four options are available when splitting a pair:
•
Steady split, which copies all differential data to the S-VOL and then splits the pair.
•
Quick split, in which the pair is immediately split, so that the S-VOL is immediately available
for read and write I/O. Remaining differential data is copied to the S-VOL in the background.
•
At-Time Split at specified times, in which all pairs in a copy group are split at the same time.
Split time indicates the time when you want to mirror P-VOL data in the S-VOL. BCM is required
for this operation.
•
Split all pairs in a consistency group. This operation requires PPRC and is similar to the At-Time
Split using BCM. However, with the PPRC operation, you cannot specify the split-time and you
can only Quick Split pairs in a consistency group. For more information, see
“Pair operations
using PPRC” (page 70) .
For split operations with RAID Manager, both Quick Split and Steady Split are available.
For more information, see HP XP P9000 RAID Manager User Guide.
42 Performing pair operations