Software Manual

112 ShadowImage for the XP128/XP1024/XP10000/XP12000
NOTE:
• The timing to copy the data is different between FlashCopy Mirror Version 2 and IBM FlashCopy. IBM
FlashCopy copies data when data in either the source or target volume is updated.
• To execute the XTNTLST parameter, the size of the copy source extent and the copy target extent must
be the same.
Creating FlashCopy Mirror Version 2 Pairs: FCESTABL
When the FCESTABL command (TSO command) with EXTENTS parameter specified is executed, only the
data on the copy source extent(s) specified by the EXTENTS parameter are copied from the volume
specified as the source by SDEVN to the volume specified as the target by TDEVN. For example, when you
copy only the “dataset 2", the copy operation processes as shown in Figure 57. When you do not specify
the EXTENTS parameter, the entire source volume is copied to the target volume.
Figure 57 Copying a Dataset by Using TSO (FCESTABL) Command with EXTENTS Parameter Specified
When the FCESTABL command (TSO command) with XTNTLTS parameter specified is executed, only the
data on the copy source extent(s) specified by the XTNTLTS parameter are copied to the copy target
FCWITHDR SDEVN Source device number. Specify the number (device address) of the S-VOL on
which you want to perform FCWITHDR command.
TDEVN Target device number. Specify the number (device address) of the T-VOL on which
you want to perform FCWITHDR command.
DDSW YES = The relationships established on the volume specified as the copy source by
SDEVN are withdrawn. The relationships are withdrawn after the contents of the
volume specified as the copy target by TDEVN are fixed.
NO = Default setting. The relationships established on the copy target are all
withdrawn. The relationship is not established when the copy target is online.
For further information about this parameter, see ”Withdrawing FlashCopy Mirror
Version 2 Pairs: FCWITHDR” on page 114.
XTNTLST Specifies the extent (the range to withdraw the relation) the starting and ending
addresses of the source and the starting and ending addresses of the target with
CCHH (cylinder and head numbers). Up to 32 extents can be specified. When
XTNTLST is not specified, the relationships on all the tracks are withdrawn.
FCQUERY DEVN Device number. Specify the number (device address) of the volume on which you
want to perform FCQUERY command.
Table 56 Parameters of PPRC TSO Commands Supported by FlashCopy Mirror Version 2 (continued)
Command Parameter Description