HP StorageWorks XP Remote Web Console Software - Manual (Page 211)

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 TrueCopy for Mainframe
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.
Freeze Option Port ID Value
Default Interface 1A-GR X'4000'-X'40ff'
Enabled Interface 1A-GR X'4100'-X'41ff'
Disabled Interface 1A-GR X'4200'-X'42ff'
ll = Fibre-channel port ID of the secondary CU (RCU) from which the paths of the TrueCopy
for Mainframe 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.
•
Mode 104 (3990 only): Mode 104 changes the default FREEZE option to enabled. This mode
should be enabled when CGROUP is being used in the GDPS environment. When mode 104
is enabled, the FREEZE option will remain enabled after HP disk array is powered off and
then back on (for example, due to some disaster). When mode 104 is not enabled, the FREEZE
option will revert to the default value of disabled after HP disk array is powered off and back
on.
For operations in a GDPS environment, mode 104 must be ON
Mode 104 is invalid for 2105 and 2107 emulation.
For further information on the HP disk array system option modes related to TrueCopy for Mainframe
(and Compatible XRC) operations, see
“XP Disk Array Modes for TrueCopy for Mainframe”
(page 12) .
CGROUP (FREEZE/RUN) Command
The CGROUP TSO command specifies:
•
The device (LDEV ID of TrueCopy for Mainframe M-VOL or simplex volume) (DEVN parameter)
•
The MCU (S/N and lowest SSID in CU) (PRIM parameter)
•
The RCU (S/N and lowest SSID in CU) (SEC parameter).
The CGROUP TSO command has the following two options:
•
FREEZE (3990 only): When CGROUP is issued with the FREEZE option, the MCU:
Blocks the logical path(s) between the specified MCU CU and RCU CU to stop all TrueCopy
for Mainframe update copy operations to the R-VOLs in the specified RCU. ◦
◦ Presents state change pending (SCP) with extended long busy status to host I/O requests,
which causes the host to queue I/Os for the M-VOLs. SCP is indicated until the
CGROUP/RUN command is issued or until the SCP time expires.
◦ Suspends all TrueCopy for Mainframe pairs with M-VOLs on the specified MCU CU.
Overview of PPRC Commands 211