HP StorageWorks XP24000/XP20000 for FlashCopy Mirroring Software User Guide (T5240-96012, May 2011)

Table 16 Parameters for the FCESTABL Command (Version 1) (continued)
DescriptionValueParameter
Data is copied in the background.
Normally, the relationship ends
automatically once all of the data has
been copied.
COPYMODE
Data is not copied in the background.
It is necessary to issue the FCWITHDR
command to delete the relationship
specified with the NOCOPY option.
Before Version 1 read/write processing
actually starts, all of the data in an
accessed track of the S-VOL is copied
to the T-VOL by on-demand copying
when one of the following data
accesses occurs:
• Write data access to the extents of
the S-VOL
• Write data access to the extents of
the T-VOL
• Read data access to the extents of
the T-VOL
NOTE: The timing of Version 1 data
copying is different from IBM
FlashCopy. IBM FlashCopy copies data
when data in either the source or the
T-VOL is updated.
NOCOPY
The path group is not checked.YESONLINTGT
The path group is checked.NO
Extents specify the range of copy by
CCHH. Up to 32 extents can be
specified.
Extents (copy range)EXTENTS
When the FCESTABL command is executed, only the extents specified by the EXTENTS parameter
are copied from the S-VOL to the T-VOL. “Copying a Dataset by Specifying the EXTENTS Parameter
(Version 1)” (page 25) shows an example of copying Dataset 2 only. If the EXTENTS parameter
is not specified, the entire S-VOL is copied to the T-VOL.
Figure 7 Copying a Dataset by Specifying the EXTENTS Parameter (Version 1)
Establishing a Version 1 Relationship 25