HP StorageWorks XP Remote Web Console Software - Manual (Page 141)

Hitachi TrueCopy for z/OS user guide 141
ICKDSF on a TrueCopy M-VOL
ICKDSF activities involve write I/O operations with device support authorization instead of normal
authorization. Because the MCU does not duplicate write I/O operations with device support authorization
at the R-VOL of a TC390 volume pair, you must suspend a TC390 pair before running ICKDSF on a TC390
M-VOL.
To perform ICKDSF on a TC390 M-VOL:
1. Connect to the MCU of the volume pair, and then start the TC390 software.
2. Suspend the volume pair, if not already suspended, using the R-VOL suspend option and the TC390A
Volume and Purge suspend options (see ” Suspending TrueCopy pairs (Suspend Pair) ” on page 131).
You can also use the CSUSPEND TSO command to suspend the pair.
3. After the M-VOL status changes to suspended/R-VOL by operator, run ICKDSF to repair the M-VOL.
4. When volume repairs are complete, resume the TC390 pair. When resuming a suspended TC390A
pair, make sure to use the appropriate Resume level pair option (see ” Resuming TrueCopy volume pairs
(Resume Pair) ” on page 134). You can also use the CESTPAIR (MODE=RESYNC) command to resume
the pair.
ICKDSF on a TrueCopy R-VOL
If you need to run ICKDSF on a TC390 R-VOL, you must change the status of the R-VOL to simplex to allow
write access to the R-VOL. The TC390 pair must then be restarted using the appropriate initial copy
options.
To perform ICKDSF on a TC390 R-VOL:
1. For TC390 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 the M-VOL Failure suspend option (see ” Suspending
TrueCopy pairs (Suspend Pair) ” on page 131) (or use CSUSPEND to suspend the pair).
2. Connect to the disk array containing the R-VOL, and then start the TC390 software.
3. On the TrueCopy main window, locate and select the R-VOL to be repaired, and then delete the pair.
For a TC390A R-VOL, make sure to use the Volume delete option (see ” Deleting TrueCopy volume pairs
(Delete Pair) ” on page 136). You can also use CRECOVER to delete 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 delete the pair. For a
TC390A M-VOL, make sure to use the Volume delete option.
7. Restart the pair using the Add Pair window (or CESTPAIR). Use the Entire 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.
Using TrueCopy for data migration and duplication
Data migration using TrueCopy Synchronous
TC390 Synchronous can be used for device or workload migration with minimal impact to host
applications. You may need to migrate data from one volume to another for any of the following reasons:
• To load data onto new or scratch volumes, such as for a new or upgraded disk arrays.
• To temporarily move data off a volume to accommodate other activities, such as repairing.
• To relocate volumes to balance workloads and distribute I/O activity evenly within and across disk
arrays for the purpose of improving disk array and system performance.