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

TrueCopy for z/OS Usage Scenarios 7-13
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
8. At the remote site, establish the same TCzA groups and TCz pairs in the
reverse direction to synchronize the original M-VOLs with the R-VOLs. Make
sure to use the Entire Volume TCz initial copy option. Table 7-4 shows the
correct timer types for performing TCzA operations in the reverse direction.
Table 7-4 Selecting the Correct Timer Type for TrueCopy for z/OS Async
Disaster Recovery
Original Configuration Timer Type for Copy Back
I/O Time-Stamp Function at Secondary System?
MCU-RCU Configuration Timer Type Yes No
n-to-1 (n>1) System None None
1-to-1 System System None
Local Local Local