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

7-16 TrueCopy for z/OS Usage Scenarios
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
Using TrueCopy for z/OS for Data Migration
TCz 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 (e.g., new or upgraded storage
system)
 To temporarily move data off a volume to accommodate other activities (e.g.,
repair)
 To relocate volumes to balance workloads and distribute I/O activity evenly
within and across storage systems for the purpose of improving storage
system and system performance
Note: TCz operations within one USP V can only be performed if the
ShadowImage for z/OS option is not active on the storage system.
The TCz initial copy operation copies the entire contents of the M-VOL to the
R-VOL. The data migration is complete when the initial copy operation
completes and the pair status changes from pending duplex to duplex. The
P/DAS host software function is used with TCz Synchronous to complete the
data migration nondisruptively. Note: If you are migrating data between
storage systems using P/DAS, both storage systems must be the same type
(USP V).
Note: If you need to migrate data from other vendors’ storage systems onto
the USP V storage system, please contact your Hitachi account team.
To use TCz Synchronous to migrate data from one volume to another:
1. Vary the R-VOL(s) offline from all attached hosts. The R-VOLs are the target
volumes onto which you are migrating the data. The M-VOLs (source
volumes) can remain online.
2. Connect to the storage system containing the volume(s) to be migrated, and
open the TrueCopy for z/OS Pair Operation window. If not already done,
install the remote copy connections and configure the ports (initiator ports for
fibre) (if migrating between storage systems), and then add the RCUs.
3. Select the correct CU, select the desired volume(s), and then start the TCz
Synchronous pair(s) using the Add Pair dialog box.
4. Monitor the progress of the initial copy operation(s) and the status of the
pair(s) on the Pair Operation window. Refresh the window as needed. When
the status has changed from pending duplex to duplex, the M-VOL and R-VOL
are identical and synchronized.