Hitachi ShadowImage for z/OS user guide (HIT9503-96007, October 2007)

ShadowImage for z/OS user guide 123
Table 56 Whether Reverse Restore Can be Performed When FlashCopy® Mirror Version 2 T-VOL is Used
as TCz Volume
NOTE: This configuration differs from the system configuration that is used when IBM FlashCopy Version 2
and PPRC are used in conjunction.
Typically, when IBM FlashCopy Version 2 and PPRC are used in conjunction, you need a DFSMS
command, a TSO command, or a ICKDSF command when you use FlashCopy® Mirror Version 2 and
TCz.Note that the procedures differ depending on whether FlashCopy® Mirror Version 2 is used in
conjunction with TCz Synchronous or TCzA.
Using a DFSMS command
Use the following procedure when a DFSMS command is used and FlashCopy® Mirror Version 2 S-VOL
and TCzA R-VOL are shared. However, if the status of the TCz Synchronous pair is duplex, you need to use
a TSO , or a ICKDSF command. In addition, for details about the DFSMS to create a FlashCopy® Mirror
Version 2 pair, see ”DFSM Command Supported by Compatible Mirroring for IBM FlashCopy Version 2”.
1. If you need to terminate the I/O operation on the volumes of TCz Synchronous pairs in order to
maintain the consistency of data, terminate the I/O operation.
2. Suspend the TCzA 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 TCzA R-VOL to online.
The host will be able to recognize the dataset on the TCzA R-VOL and figure out the extent for creating
a FlashCopy® Mirror Version 2 pair.
NOTE: If the same host is connected to both TCzA M-VOL and R-VOL, the R-VOL label must be
rewritten.
4. Use DFSMS to create a FlashCopy® Mirror Version 2 pair. See the following example:
COPY FULL INDYNAM(xxxxxx) OUTDYNAM(yyyyyy) FASTREP(REQ) FCCOPY
For details about the DFSMS to create a FlashCopy® Mirror Version 2 pair, see ”DFSM Command
Supported by Compatible Mirroring for IBM FlashCopy Version 2”.
5. If step 4 completes successfully, set the TCz Synchronous R-VOL to offline.
6. Resynchronize the TCz Synchronous pair.
Using FlashCopy® Mirror Version 2 T-VOL and TrueCopy for z/OS M-VOL when shared
Follow the procedures below if FlashCopy® Mirror Version 2 T-VOL and TrueCopy for z/OS M-VOL are
shared.
1. Suspend the TrueCopy for z/OS pair. See the following example:
CSUSPEND DEVN(X dev#') PTIM(X ssid' cmd_param X cca X lss) sec(X ssid' serial# X
cca X lss)
2. Use DFSMS to create a FlashCopy® Mirror Version 2 pair. See the following example:
COPY DS(INCL(****.**)) INDYNAM (XXXXXX) OUTDYNAM(YYYYYY) FASTREP(REQ)
FCCOPY?FCTOPPRCPRIMARY
Shared TrueCopy for z/OS Pair
Volume
Status of TrueCopy for z/OS Pair
Duplex Pending duplex Suspend
TrueCopy for
z/OS
Synchronous
M-VOL N/A N/A OK
TrueCopy for
z/OS
Asynchronous
M-VOL N/A N/A OK