HP StorageWorks XP Remote Web Console Software - Manual (Page 42)

Legend
: At-Time Split function
S-VOL S-VOL S-VOL S-VOL
T-VOL T-VOL T-VOL T-VOL
I/O
Pairs in the same
consistency group
Host
Figure 16 At-time Split Function (specifying Split Time)
CAUTION:
When you execute the At-Time Split function, keep the following in mind:
• Change the status of pairs in the same consistency group according to the copy group.
• If you are going to execute the At-Time Split function successively, before you execute the function
for the 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 more information, see the Business
Continuity Manager User’s Guide.
If you do not do this, the data in the S-VOL may not be copied to the T-VOL.
NOTE:
•
For the pairs in the consistency group to which you registered the Split time, you can only perform
Suspend Pair operations or Delete Pair operations. If you perform Add Pair, Split or Resync Pair
operation, registration of the Split time is rejected. If you want to perform Add Pair, Split or Resync
Pair operation, you must first reset the registration of the Split time.
• The specified Split time is reset by executing PS OFF.
• If the Split time is registered, the Split operation may be delayed if no read/write request is issued
and the Split operation, as a result, is performed as a result of timeout of the storage system timer.
• In case 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.
• If you specify the copy group to split a pair, you must select Quick Split or Steady Split.
• If you register the split time, the pair is split with Quick Split.
Hitachi ShadowImage™ for z/OS Pair Status
The Siz Remote Web Console software displays the Siz pair status of all mainframe volumes under the
specified CU image of the connected XP12000 storage system. The following illustrates the pair status
transitions and the relationship between the pair status and the Siz operations.
42 Overview of Hitachi ShadowImage for z/OS Operations