HP StorageWorks P9000 Reference Manual page 243

NOTE:
If operations with a REVERSE specification such as planned outage take place, to control CA,
CAA, or CAJ from the script, HP recommends that you specify explicitly the FORWARD or
REVERSE parameter.
When specifying the FORWARD or REVERSE parameter to change the copy direction of the
copy group, be sure to execute the YKQUERY command or YKEWAIT command and obtain
information for the changed copy direction before performing operation.
When a copy is performed from low-capacity CA, CAA, or CAJ volumes to high-capacity
volumes, if a failure occurs on the secondary site, a CA, CAA, or CAJ copy cannot be
performed in the reverse direction (from the secondary site to the primary site). HP recommends
strongly that copying from a small volume to a large volume function should be used exclusively
for data migration.
After this command is executed against a volume is SWAPPING status, the direction of copy
is reversed.
The YKRESYNC command terminates successfully when the instruction to the copy pair
succeeded. Even if the YKRESYNC command terminates with return code 0, the copy pair
might not be in the DUPLEX status. After you execute the YKRESYNC command, use the
YKQUERY or YKEWAIT command to make sure that the copy pair status has changed to
DUPLEX. If there is a volume whose status has not been changed, re-execute the YKRESYNC
command with the VOLUNIT parameter specified for all the copy pairs.
If ONLINE(YES) parameter is specified, volume corruption might occur because a copy pair
can be made even if the S-VOL is being used. Thus, consideration with respect to volume
operation is required, such as limiting operation to the time periods when the S-VOL is not
being used.
To use the YKRESYNC command to reflect the change in the ERRORLEVEL attribute on the
device, specify the VOLUNIT parameter (or specify the DEVN parameter on a copy pair basis).
If the parameter is not specified, the attribute change is not reflected.
Even if the status transition is successful, an I/O error might occur and the command might
terminate with return code 32. When you create a script, code it in such a manner that the
YKQUERY or YKEWAIT command is executed to check the results of status transitions, even if
the command terminates with return code 32, and the processing resumes after a successful
status transition.
Return Codes
Table 130 (page 243)
Table 130 YKRESYNC Command Return Code List
Return Code Meaning
-4095 to -4040 The command terminated abnormally, possibly because the user SVC routine has
not been included properly.
The module cannot be loaded. Possible causes are as follows:
-3
An interruption occurred during execution.
-1
The command completed normally.
0
Since a volume with an invalid status was found in the copy group, processing for
4
the volume will be skipped.
lists the return codes to be returned when the YKRESYNC command terminates.
The library dataset has not been linked.
The module is protected by the RACF program control function.
Command details 243