Hitachi TrueCopy for z/OS user guide (December 2005)

TrueCopy for z/OS user guide 153
• When cmd_param AGxxx is specified, this command ends before the actual pair
establishment/re-establishment successfully starts. Confirmation by CQUERY or IEA494I console
message is recommended after this command.
• The dummy pair for each primary volume can be established only by the PPRC command. For the use
of dummy pair, note the following:
• Use the dummy pair only for a limited number of the critical volumes.
• The dummy pair function is only for ESCON-connected TC390A pairs.
• Up to three dummy pairs can be specified for one master pair.
• The dummy pair should be an actual volume that has the same CU number as the master pair.
• The dummy pair should be offline from each host.
• The dummy pair cannot be used as a user volume.
• Establish the master pair before establishing the dummy pair.
CSUSPEND
Table 35 on page 154 describes how to use the CSUSPEND command to suspend TC390A pairs and
groups. The syntax for the CSUSPEND command is:
For 3990-3, -6 and -6E controller emulations:
CSUSPEND DEVN(X’dev#’) PRIM(X’ssid’
cmd_param X’cca’) SEC(X’ssid’ serial# X’cca’) [PRIMARY]
[QUIESCE]
For 2105 controller emulation, addressed device is M-VOL (new ‘lss’ parameter for LCU no.):
CSUSPEND DEVN(X’dev#’) PRIM(X’ssid’
cmd_param X’cca’ X’lss’) SEC(X’ssid’ serial# X’cca’ X’lss’)
[PRIMARY] [QUIESCE]
For 2105 controller emulation, addressed device is R-VOL (new ‘lss’ parameter for LCU no.):
CSUSPEND DEVN(X’dev#’) PRIM(X’ssid’
cmd_param X’cca’ X’lss’) SEC(X’ssid’ serial# X’cca’ X’lss’)
[PRIMARY] [QUIESCE]
NOTE: If you need write access to an R-VOL, you must delete the pair (CDELPAIR).
*If the addressed device is the M-VOL, only TC390A pairs in the same disk array are suspended. Volume
pairs whose M-VOLs are behind other MCUs are not affected.
• If the first digit of the
cmd_param is other than A, the disk array interprets this command as pair
suspension for TC390 Synchronous or SI390.
Table 35 Using CSUSPEND to suspend TrueCopy Async pairs
Parameters Contents Description
cmd_param AGD00 Specifies that all the volume pairs in the consistency group should be suspended
after all pending recordsets are settled (Drain suspend option).
AGP00 Specifies that all the volume pairs in the consistency group should be suspended.
Pending recordsets are not always settled before suspension (Purge suspend
option).
AVD00 Specifies that only addressed volume pair should be suspended after the pending
recordset for addressed volume settled (Drain suspend option).
AVP00 Specifies that only the addressed volume pair should be suspended. Pending
recordsets for addressed volume are not always settled (Purge suspend option).
PRIMARY Invalid keyword for TC390A volume pairs.
QUIESCE Invalid keyword for TC390A volume pairs.