Suspend Pair Creation - HP StorageWorks P9000 - Disk Arrays User Manual

Prerequisite information
Make sure to change the status of pairs in the same consistency group according to the copy
group.
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 Add Pair, 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.
Before executing At-Time Split a second time, verify that status of all the pairs in the same
consistency group is changed to the status which is specified by the YKEWAIT command. For
detailed information about the YKEWAIT command, see the HP StorageWorks P9000 for
Business Continuity Manager User Guide.
Procedure 6 To perform the At-Time Split operation
1. Define a consistency group for the Business Copy Z pairs that will be split using At-Time Split.
2. Specify the consistency group as a Business Continuity Manager copy group, or register the
split time.
When you specify the copy group, select the split type: Quick Split or Steady Split. When you
register the split time, the split type will be Quick Split.
3. Specify the At-Time Split option, then create the pairs.
4. 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 T-VOL of the pair), the pair status becomes
Suspend. The T-VOL continues accepting write I/O operations to the S-VOL and marks the entire
S-VOL track as difference data. When a pairresync operation is performed on a suspended pair,
the pair status becomes Resync, and the entire S-VOL is copied to the T-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 7 To suspend pair(s):
1. Click Actions > Local Copy > Business Copy for Mainframe/Compatible FlashCopy > 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 CU image or S-VOL in the Tree to
filter the volumes displayed in the Volume List.
30 Performing pair operations
icon.