Hitachi TrueCopy for IBM z/OS User and Reference Guide (T5211-96001, June 2007)

6-34 Performing TrueCopy for z/OS Pair Operations
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
ICKDSF on a TrueCopy for z/OS R-VOL
If you need to run ICKDSF on a TCz R-VOL, you must change the status of the
R-VOL to simplex to allow write access to the R-VOL. The TCz pair must then
be restarted using the appropriate initial copy options. To perform ICKDSF on
a TCz R-VOL:
1. For TCz Synchronous pairs, you can stop write I/Os to the M-VOL while the R-
VOL is being repaired. To do this, suspend the pair from the MCU using M-
VOL Failure for the Suspend Kind option (or use CSUSPEND to suspend the
pair).
2. Connect to the storage system containing the R-VOL, and open the TrueCopy
for z/OS windows.
3. Locate and select the R-VOL to be repaired, and then release the pair. For a
TCzA R-VOL, make sure to use Volume for the Delete Range option. You
can also use CRECOVER to release the pair at the RCU.
4. If necessary, change the R-VOL VOLSER to avoid problems due to duplicate
VOLSERs.
5. Vary the R-VOL online, and run ICKDSF to repair the R-VOL. When the
volume repairs are complete, vary the R-VOL offline.
6. Connect to the MCU, locate and select the M-VOL, note the group number,
and release the pair. For a TCzA M-VOL, make sure to use the Volume for
the Delete Range option.
7. Restart the pair using the Add Pair dialog box (or CESTPAIR). Use Entire
Volume for Initial Copy option to resynchronize the M-VOL and R-VOL.
Note: If you are absolutely sure that the M-VOL and R-VOL are still identical,
you can restart the pair using the No Copy option.