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HP StorageWorks XP Remote Web Console Software User Manual

Page 112

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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SDEVN are withdrawn. The relationships are withdrawn after the contents of the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withdrawn.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XTNTLST is not specified, the relationships on all the tracks are withdrawn.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