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

TrueCopy for z/OS Usage Scenarios 7-15
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
Caution: Before issuing the CESTPATH command, you must make sure
that the relevant paths are offline from the host(s) (e.g., configure the
Chipid offline, deactivate the LPAR, or block the port in the ESCD). If any
active logical paths still exist, the add path operation will fail because the
port mode cannot be changed.
8. At the main site, establish all TCzA groups and TCz pairs in the original
direction. You may use the No Copy initial copy option because all M-VOLs
and R-VOLs are synchronized. If there is any possibility that the volumes are
not 100% synchronized, use the Entire Volume initial copy option to be
safe.
9. Vary the MCU and M-VOLs online, and start the applications at the main site.