HP XP P9500 HP StorageWorks P9000 for Business Continuity Manager Software Ref - 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) lists the return codes to be returned when the YKRESYNC command terminates. Table 130 YKRESYNC Command Return Code List Return Code -4095 to -4040 -3 Meaning 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: • The library dataset has not been linked. • The module is protected by the RACF program control function. -1 An interruption occurred during execution. 0 The command completed normally. 4 Since a volume with an invalid status was found in the copy group, processing for the volume will be skipped. Command details 243