Suspend Pair Creation - HP XP P9500 User Manual

Prerequisite Information
On registering split time:
◦ When you register the Split time, you can only perform Suspend or Delete pair operations.
Split time is rejected if the Paircreate, Split, or Resync operation is performed. If you want
to perform one of these operations, reset the registration of the Split time.
The specified Split time is reset when power is switched off.
◦
If the Split time is registered, the Split operation is performed when the read/write
◦
request—with a time stamp past the specified Split time—is received. The Split operation
may be delayed if no read/write request is issued. When I/O does not occur, the Split
operation is performed by the storage system timer.
◦ If the Split time is registered, and if there is a pair in the consistency group that cannot
be split completely during the Split operation, the status of this pair remains the same as
before the Split operation.
NOTE: The At-Time Split option is disabled if pair operations are performed from Remote Web
Console following the creation of the pairs in RAID Manager. Thus, At-Time Split operates correctly
only when all pair operations are performed using RAID Manager.
To perform the At-Time Split operation:
1. Define a consistency group for the Business Copy pairs that will be split using At-Time Split.
2. Specify the At-Time Split option, then create the pairs.
3. Split the pairs in the consistency group. The pairs will be split simultaneously.

Suspend pair creation

When you suspend the creation of pairs (copy to the S-VOL of the pair), the pair status becomes
PSUE. The S-VOL continues accepting write I/O operations to the P-VOL and marks the entire P-VOL
track as difference data. When a pairresync operation is performed on a suspended pair, the pair
status becomes COPY(RS), and the entire P-VOL is copied to the S-VOL. While the pairresync
operation for a split pair can be very fast, the pairresync operation for a suspended pair takes as
long as the initial copy operation.
The storage system will automatically suspend a pair when it cannot keep the pair mirrored for
any reason. The storage system will automatically suspend a pair under the following condition:
When the storage system detects an error condition related to an update copy operation.
Procedure 2 To suspend pair(s):
1. Click Actions > Local Copy > Business Copy/Snapshot > Pair Operation to open the Pair
Operation window.
2. Change to Modify mode by clicking the
3. Go to the Pair Operation window, and select the desired port or host group in the Tree to
filter the volumes displayed in the Volume List.
36 Performing pair operations
icon.