HP StorageWorks XP Remote Web Console Software - Manual (Page 213)

Figure 62 Overview of GDPS Operations
(1) Read/write I/Os are issued from the host.
(2) A failure occurs on a TrueCopy for Mainframe M-VOL, and the MCU suspends the pair.
(3) Suspend and extended long busy state are reported to the host.
(4) Host reports IEA494I with extended long busy state.
(5) CGROUP/FREEZE commands are issued to groups.
(6) SCP sense bytes are reported if an I/O is issued to a frozen volume.
(7) I/Os are queued at the host.
(8) Switch to remote (secondary) site.
Using PPRC TSO Commands with CGROUP Support
CESTPATH. You can use the CESTPATH command to recover a blocked MCU-RCU path. Make
sure to use the same parameters as when the path was established.
CESTPAIR. After you re-establish the MCU-RCU path that was blocked, you can use the
CESTPAIR/RESYNC command to resynchronize the TrueCopy for Mainframe pairs suspended by
the CGROUP/RUN command.
CDELPAIR. After you re-establish the MCU-RCU path that was blocked, you can use the CDELPAIR
command to release the TrueCopy for Mainframe pairs suspended by the CGROUP/FREEZE
command. If CDELPAIR is issued to a TrueCopy for Mainframe pair whose MCU-RCU path is still
blocked, the MCU rejects the command (F/M=0F, TrueCopy for Mainframe error code=5A).
CRECOVER. You can use the CRECOVER command to change a suspended R-VOL to simplex. This
command is issued to the R-VOL and does not affect the suspended M-VOL.
CQUERY/PATHS.
“CQUERY Output Example: M-VOL/Volume/Format” (page 215) shows the output
of the CQUERY command issued to a TrueCopy for Mainframe MCU to which the CGROUP/FREEZE
command has been issued.
“CQUERY Output Example: R-VOL/Paths/Format” (page 215) shows
the output of the CQUERY command issued to the TrueCopy for Mainframe RCU which has a
blocked path due to the CGROUP/FREEZE command.
CQUERY/VOLUME.
“CQUERY Output Example: M-VOL/Volume/Format” (page 215) shows the
output of the CQUERY command issued to a TrueCopy for Mainframe M-VOL which has been
suspended by the CGROUP/FREEZE command. As shown in
“CQUERY Output Example:
M-VOL/Paths/Format” (page 214) , CQUERY issued to an M-VOL also indicates the status of the
FREEZE option: CGRPLB(YES) = enabled, CGRPLB(NO) = disabled. “CQUERY Output Example:
R-VOL/Volume/Format” (page 216) shows the output of the CQUERY command issued to a TrueCopy
for Mainframe R-VOL whose M-VOL has been suspended by the CGROUP/FREEZE command. The
pair status and path status at the RCU are not changed.
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For 3990-6 and 3990-6E controller emulations:
*************** PPRC REMOTE COPY CQUERY - PATHS ********************
* PRIMARY UNIT: SERIAL#= 000000090217 SSID= 00F8 *
* FIRST SECOND THIRD FOURTH *
Overview of PPRC Commands 213