Filter
Top Products
Chapter 14. Metro Mirror interfaces 153
This command has parameters that allow it to indicate whether the operation is an initial
establish of volumes that were in the simplex state, whether it is a resynchronization of a
suspended pair of volumes, whether it is a Metro Mirror or Global Copy pair, or whether
Failover or Failback processing is being requested.
Example 14-1 shows the command necessary to establish an initial Metro Mirror pair.
Example 14-1 TSO CESTPAIR command
ANTP8802I CESTPAIR DEVN(X'6400') PRIM(X'0002' AAVCA X'00' X'00')
SEC(X'0003' AAVCA X'00' X'01') OPTION(SYN
ANTP8802I (CONT) C) MODE(COPY) ONLINSEC(NO)
ANTP0001I CESTPAIR COMMAND COMPLETED FOR DEVICE 6400. COMPLETION CODE:
00
IEA494I 6400,DS6400,PPRC PAIR PENDING,SSID=0002,CCA=00
IEA494I 6400,DS6400,PPRC PAIR FULL DUPLEX,SSID=0002,CCA=00
In Example 14-1, the primary volume resides on LSS x’00’ of the application site DS6000.
The SSID of the LSS is x’0002’, the serial number of the DS6000 is AAVCA, its CCA is x’00’,
and the LSS is x’00’. The secondary volume resides in LSS x’00’ of the recovery site DS6000.
Its CCA is x’00’. This matching between the last two digits of the device number address and
the CCAs of the primary and the secondary volumes is not mandatory; however, it is useful
for working with the configuration. CCA is discussed in “Channel connection address” on
page 152.
The MSGREQ(YES) parameter specifies that Metro Mirror wait until the initial full volume
copy operation is complete before issuing the completion message ANTP0001I. If you are
using automation, use this message as a trigger for other operations.
14.2.3 CESTPATH
When you are establishing a path between DS6000s for Metro Mirror, use the CESTPATH
command. There must be a physical Fibre Channel connection between the two DS6000
subsystems. You need to know the SSID, World Wide Node Name (WWNN), and LSS
number for the primary and secondary DS6000s. These can be displayed with the CQUERY
command.
Example 14-2 shows an example of a CESTPATH command to establish Metro mirror paths.
Example 14-2 CESTPATH command
CESTPATH DEVN(X'6400') PRIM(X'0002' 500507630EFFFCA0 X'00') -
SEC(X'0003' 500507630EFFFCA0 X'01') -
LINK(X'00000100') CGROUP(NO)
The example shown in Example 14-2 is establishing a loopback path to the same DS6000.
The SSID of the primary volume is x’0002’, the WWNN is 500507630EFFFCA0, and the LSS is
x’00’.
The link address specifies the DS6000 host adapter ports for the Metro Mirror path. The
format of each Fibre Channel path address has the hex digit form of 00300200 where:
0000 Specifies the Fibre Channel adapter used for the path in the primary subsystem.
0100 Specifies the Fibre Channel adapter used for the path in the secondary
subsystem.