Setting up pairs in consistency groups, Splitting pairs in consistency groups, Resynchronizing pairs in consistency groups – HP XP P9500 Storage User Manual
Page 79: Deleting pairs in consistency groups, Cquery
Setting up pairs in consistency groups
1.
In the RWC, reserve a consistency group using the instructions in
2.
Using PPRC, create the pairs by running the CESTPAIR or PPRCOPY ESTPAIR command.
3.
In the RWC, in the CTG window, make sure that the pairs exist in the consistency group as
expected.
Splitting pairs in consistency groups
1.
Run the CSUSPEND or the PPRCOPY SUSPEND command. The command splits all the pairs
in the consistency group.
NOTE:
Running the command on a split pair does not generate errors.
2.
Run the CQUERY or PPRCOPY QUERY command to check pair status. The status should be
Split/SUSPOP.
Hosts can now access the data in S-VOL.
Resynchronizing pairs in consistency groups
1.
Resynchronize pairs by running the CESTPAIR or PPRCOPY ESTPAIR command. The command
resynchronizes all the pairs in the consistency group. Running the command on a pair which
has not been split does not generate errors.
2.
Run the CQUERY command or the PPRCOPY QUERY command to make sure that the pair
status is PENDING or DUPLEX.
Deleting pairs in consistency groups
1.
Delete pairs by using the CDELPAIR or PPRCOPY DELPAIR command. The command deletes
all the pairs in the consistency group.
2.
Use the CQUERY or PPRCOPY QUERY command to make sure that the pair status is SIMPLEX
Showing pair information with CQUERY TSO, QUERY ICKDSF
You can view pair status and volume information using the CQUERY TSO and the QUERY ICKDSF
commands.
•
The commands can be issued to the P-VOL or S-VOL.
•
If a P-VOL has multiple S-VOL, status is shown for the pair whose S-VOL has the lowest LDEV
ID. To obtain status of a pair with another S-VOL, issue the command to the desired S-VOL.
•
If the system contains both BC Z and Cnt Ac-S Z pairs, the CQUERY and the PPRCOPY QUERY
commands report Cnt Ac-S Z pair status. To obtain the BC Z status, issue the command to the
BC Z S-VOL.
•
When BC Z and Cnt Ac-S Z share volumes, path status is shown for Cnt Ac-S Z. If they do not
share volumes, path status for the BC Z pair is shown as FFFF FFFF.
The following sections shows the commands, parameters, and examples for showing pair
information.
CQUERY
The following table shows CQUERY command parameters used to show pair information.
Table 19 CQUERY parameters
Value
Parameter
Device number
DEVN
Showing pair information with CQUERY TSO, QUERY ICKDSF
79