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

Performing TrueCopy for z/OS Configuration Operations 5-67
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
Discontinuing TrueCopy for z/OS Operations
If you plan to use TCz for nondisruptive data migration or duplication, you will
configure and establish TCz operations, allow TCz to synchronize the volumes,
redirect application I/Os (if migrating), and then discontinue TCz operations.
When you are ready to discontinue TCz operations, you will need to perform
TCz operations in the correct order to avoid generating error messages. For
example, TCz will not allow you to delete an RCU path until you have released
all TCz pairs still using that path, and you cannot delete a group until you have
released all TCzA pairs in that group from the MCU.
To discontinue all TCz operations, perform the following actions in the
following order:
1. First release all TCz pairs from the MCU(s). For TCzA pairs, you can use the
Group for Delete Rangeoption to release all pairs in a group using one
operation. Verify that the pair status has changed to simplex for all TCz
volumes before continuing.
2. Delete the TCzA group(s) from the MCU(s). The RCU will automatically delete
a group when all pairs in the group have been released.
3. Delete the RCUs. Check each CU of each MCU to make sure that all RCUs
have been deleted before continuing. Note: If system option mode 114 is
enabled, you can use the CDELPATH TSO command to delete the RCUs and
automatically reset the ports.
4. Remove the remote copy connections (physical paths). If you are not familiar
with the operation of the remote copy hardware components (e.g., switches),
please call the Hitachi Support Center for assistance.
5. At the MCU(s), reset the USP V initiator port(s) to ordinary target(s). At the
RCU(s), reset the USP V RCU target port(s) to ordinary target(s). Note: If
you used the CDELPATH TSO command to delete the RCUs, USP V
automatically reset each port after the last path to an RCU was deleted.
Note: For fibre-channel interface, do not use the CESTPATH and CDELPATH
commands at the same time as the SCSI path definition function of LUN
Manager.