HP StorageWorks XP Remote Web Console Software - Manual (Page 77)

On registering the split time:
•
For the pairs in the CTG 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 Pair Resync
operation, registration of the Split time will be rejected. To perform Add Pair, Split or Pair
Resync operation, you must first reset the registration of the Split time.
•
The specified Split time will be reset by switching off the power supply.
•
If the Split time is registered, the Split operation is performed at the time of reception of the
read/write request with a time stamp that has passed the time specified as the Split time. The
Split operation may be delayed in case 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.
•
If the Split time is registered, and if there is a pair in the CTG that cannot be split completely
during the Split operation, the status of this pair will remain the same as before the Split
operation.
Using PPRC Commands to Split, Resynchronize, and Delete Pairs in a CTG
By using a PPRC command, you can split, resynchronize, and delete all SIz pairs in the same CTG
at once. For specifications of CTGs, see
Page 76 . For details on how to set, reset, and reference
CTGs, see Page 66 .
The following explains how to use PPRC commands to manipulate CTGs:
•
Preparation for CTG
Start up ShadowImage for Mainframe from Remote Web Console, and reserve a CTG. 1.
2.
Create SIz pairs by using the PPRC CESTPAIR command or the ICKDSF PPRCOPY ESTPAIR
command.
3. In the CTG dialog box, make sure that SIz pairs have been made in the correct CTG.
•
To split all pairs in the same CTG
Execute the PPRC CSUSPEND command or the ICKDSF PPRCOPY SUSPEND command.
If you perform the CSUSPEND or PPRCOPY SUSPEND command on a pair in a CTG, the
command effects all pairs in the CTG. If you perform the command on a pair which has
already been split, no errors will occur.
1.
2. Make sure that the pair status is Split by using the CQUERY or the PPRCOPY QUERY
command.
3. Hosts can access the data in the SIz T-VOLs.
•
To resynchronize pairs in the same CTG
Resynchronize SIz pairs by using the PPRC CESTPAIR command or the ICKDSF PPRCOPY
ESTPAIR command.
If you perform the CESTPAIR or PPRCOPY ESTPAIR command on a pair in a CTG, the
command will effect all pairs in the CTG.
1.
If you perform the command on a pair which has not been split, no errors will occur.
2. Use the CQUERY command or the PPRCOPY QUERY command to make sure that the
pair status is Pending or Duplex.
•
To delete pairs in the same CTG
Delete SIz pairs by using the PPRC CDELPAIR command or the ICKDSF PPRCOPY DELPAIR
command.
If you perform the CDELPAIR or PPRCOPY DELPAIR command on a pair in a CTG, the
command will effect all pairs in the CTG.
1.
2. Use the CQUERY command or the PPRCOPY QUERY command to make sure that the
pair status is Simplex.
Using PPRC Commands to Split, Resynchronize, and Delete Pairs in a CTG 77