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

A-30 Using PPRC Commands for TrueCopy for z/OS
Hitachi Universal Storage Platform V TrueCopy for IBM z/OS User’s Guide
• PPRC: The host systems at the main and remote sites must have IBM PPRC
support as well as the PPRC ERP PTF installed. ICKDSF does not support the
CGROUP command.
• SSIDs: The MCUs to which the CGROUP command will be issued must have
consecutive SSIDs. The Hitachi representative configures the SSIDs on the
USP V SVP.
Caution: MVS requires that the storage system be offline during SSID
changes. Reconfiguring SSIDs is therefore a disruptive event which must
be carefully planned.
• FREEZE Option (3990 only): The FREEZE option must be enabled on the
MCUs to which the CGROUP command will be issued. If not enabled, the MCU
will reject the CGROUP TSO command. The FREEZE option is enabled using
the Storage Navigator computer (RCU Option dialog box). Enable the FREEZE
option only after adding all MCU-RCU paths.
Note: Mode 104 (see below) changes the default FREEZE option from
disabled to enabled. Mode 104 is invalid for 2105 and 2107 emulation.
Note: For 2105 and 2107 controller emulation, do not use the FREEZE
option. Use the CGROUP option of the CESTPATH command.
The definition of the LINK Parameter for the CESTPATH command will
be expanded to specify the FREEZE option on an LCU pair basis. The
FREEZE option set by the CESTPATH command is effective until another
CESTPATH command which specifies the same LCU pair but a different
FREEZE Option is issued. The command syntax and parameter definitions
are as follows (3990 only):
CESTPATH PRIM(x’ssid’ serial#) SEC(x’ssid’ serial#)
LINK(x’ppppllcc’, ‘ppppllcc’,…) DEVN(x’1234’)
where:
pppp = Fibre-channel port ID of the primary CU (MCU) from which the
TCz paths should be established and the FREEZE option for the LCU
pair. Note that the first two digits (FREEZE option) must be the
same in a series of link parameters.
Value Port ID Freeze
Option
X’4000’-
X’40ff’
Interface 1A-
GR
Default
X’4100’-
X’41ff’
Interface 1A-
GR
Enabled
X’4200’-
X’42ff’
Interface 1A-
GR
Disabled
ll = Fibre-channel port ID of the secondary CU (RCU) from which the
paths of the TCz should be established
cc = LCU number of the secondary CU (RCU).
The parameters may be described in the GDPS DASD configuration list.
The required link parameter values must be written into the list or must
be given to RCMF input.