HP StorageWorks XP24000 for FlashCopy Mirroring Software User's Guide (T5240-96001, June 2007)

TrueCopy Synchronous for Mainframe pair is either Duplex of Pending duplex, the command
will be rejected and you cannot establish a Version 2 relationship.
• Results of TrueCopy Synchronous for Mainframe operations
If a
Version 2 relationship is established with the FREEZE option and if a TrueCopy
Synchronous for Mainframe R-VOL is in the extended long busy (ELB) status, the command
to
create or resume a pair will be rejected. However, the command to suspend or delete
a
pair will b e executed normally.
When you use a Version 2 S-VOL as the TrueCopy for Mainframe R-VOL, c onfigure the system
as
follows:
• Connect different hosts to the main subsystem and remote subsystem, or connect the host of
the
main subsystem to both the main and remote subsystems.
• Use the Fibre Channel interface to connect the main subsystem with the remote subsystem.
Note: The above-mentioned system configuration differs from the system configuration that is used
when IBM FlashCopy Version 2 and PPRC are used in conjunction.
Unlike when IBM FlashCopy Version 2 and PPRC are used in conjunction, you need a DFSMS command
or a
TSO command when you use Version 2 and TrueCopy for Mainframe in conjunction. The procedures
when you use a DFSMS command or a TSO command are as follows. Note that the procedures differ
depending on whether Version 2 is used in conjunction with TrueCopy Synchronous for Mainframe or
TrueCopy Asynchronous for Mainframe.
• Procedure when you use a DFSMS command
Follow the procedure below if you use a DFSMS command. However, if the status
of the TrueCopy Synchronous for Mainframe pair is duplex, you need to use a TSO
command. For details about the DFSMS to establish a Version 2 relationship, see
“Establishing Version 2 Relationships by Volumes Using the DFSMSdss Command” on page 77.
• If the Version 2 S-VOL and TrueCopy Synchronous for Mainframe R-VOL are shared:
1. If you need to terminate the I/O operation to the volumes of the TrueCopy Synchronous
for Mainframe pairs in order to m a intain the consistency of data, terminate the I/O
operation.
2. Suspend the TrueCopy Synchronous for M ainframe pair. See the following example:
CSUSPE
ND DEVN(X dev#’) PRIM(X ssid’ cmd_param X cca X lss)
SEC(X ssid’ serial# X cca X lss)
3. Set the TrueCopy Synchronous for Mainframe R-VOL to online.
The hostwillbeabletorecognize thedataset on theTrueCopySynchronous for
Mainframe R-VOL and figure out the extent for establishing a Version 2 relationship.
Note: If the same host is c onnected to both the TrueCopy Synchronous for Mainframe
M-VOLand R-VOL, theR-VOL labelmustberewritten.
4. Use DFSMS to establish a Version 2 relationship. S ee the following example:
COPY FULL INDYNAM(xxxxxx) OUTDYNAM(yyyyyy) FASTREP(REQ) FCCOPY
5. If step 4 completes successfully, set the TrueCopy Synchrono us for Mainframe R-VOL
to
offline.
6. Resyn
chronize the TrueCopy Synchronous for M ainframe pair.
• If the Version 2 S-VOL and TrueCopy Asynchronous for Mainframe R-VOL are shared:
1. If you need to terminate the I/O operation to the volumes of the TrueCopy Asynchronous
for Ma
inframe pairs in order to maintain the consistency of data, terminate the I/O
operation.
2. Suspend the TrueCopy Asynchronous for Mainframe pair. See the following example:
CSUSPEND DEVN(X dev#’) PRIM(X ssid’ cmd_param X cca X lss)
SEC(X ssid’ serial# X cca X lss)
3. Set the TrueCopy Asynchronous for Mainframe R-VOL to online.
The h
ost will be able to recognize the dataset on the TrueCopy Asynchronous for
Mai
nfra me R-VOL and figure out the extent for establishing a Version 2 relationship.
52
About
Version 2 Operations