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

A-4 Using PPRC Commands for TrueCopy for z/OS
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
Note: The CESTPATH RESETHP option rejects the host I/O operations. Before
you use the RESETHP option of the CESTPATH command, stop the I/O
operations from the host.
Note: The ‘lss’ parameter of the PPRC command depends on the CU emulation
type. Set the ‘lss’ parameters as follows:
• If the package connected to the host is 2105 or 2107 CU emulation type, set
the ‘lss’ parameter for both the MCU and RCU.
• If the package connected to the host is 3990 CU emulation type, do not set
‘lss’ parameter for MCU or RCU.
Note on 2105 or 2107 CU Emulation Type of MCU: When the CU
emulation type of MCU is 2105 or 2107, and a host system is online to R-VOL,
even if you want to create a TC-MF pair by using the CESTPAIR command,
the CESTPAIR command is rejected. If you use the ONLINSEC(YES), you
can create a TC-MF pair even though a host system is online to R-VOL. If you
do not use the ONLINSEC (default), or if you use the ONLINSEC(NO), you
cannot create a TC-MF pair. If RCU does not support the 2105 or 2107 CU
emulation type, you cannot check whether a host system is online or not. In
this case, if you use the CESTPAIR command, and both MCU and RCU fulfill
the following condition, specify the ONLINSEC(YES).
• MCU is USP V, and the host on the MCU side is connected to the package of
2105 or 2107 CU emulation type.
Note: If you use PPRC command and register 0xFFXX to SSID of MCU and
RCU, the command may be rejected. Please specify excepting 0xFFXX. (XX of
0xFFXX is given in hexadecimal.)
Note: When you issue the QUERY command with the PATH option to R-VOL by
using ICKDSF, the command might be rejected. In this case, please check the
path status by using CQUERY TSO command or Storage Navigator.