HP XP7 Storage - Manual (Page 43)

The timing to copy the data when the relationship is established is different between Compatible
FlashCopy and Compatible FlashCopy SE. Compatible FlashCopy SE copies data when data is
updated in either the source or target volume.
CAUTION: A time-out may occur when more than 100 FlashCopy relationships are established
at the same time. To avoid timeouts, divide the tasks into small groups and establish relationships
at intervals of about 5 seconds per 100 relationships.
Using PPRC TSO to establish Compatible FlashCopy relationships by volumes
The following table shows the settings that you can use with the FCESTABL command when you
establish Compatible FlashCopy relationships by volumes:
Table 21 Parameters for the FCESTABL command (Volume copying)
Description Value Parameter
Specify the device address of the S-VOL on which you want to perform
the FCESTABL command. (This parameter is required.) Source device
number SDEVN
Specify the device address of the T-VOL on which you want to perform
the FCESTABL command. (This parameter is required.) Target device
number TDEVN
Default setting. All the data in the copy range of the volume specified as
the source by SDEVN is background-copied to the volume specified as COPY MODE
the target by TDEVN. The relationship ends automatically, and all the
data is copied.
Data is not copied in the background. The relationship does not end
automatically even when all the data is copied. To withdraw the NOCOPY
relationship, use the FCWITHDR command. In the following data, access
occurs. The data subject to read/write processing is copied from the
source to the target before Compatible FlashCopy read/write processing
starts.
• When there is access to write data on the copy source of the specified
area (within the extent)
•
When there is access to write data on the copy target of the specified
area (within the extent) or
• When there is access to read data on the copy target of the specified
area (within the extent)
The relationship made by NOCOPY mode is copied in the background.
When all the data are copied, the relationship is released automatically. NOCOPY2COPY
The path group is not checked. The relationship is established even when
the copy target is online. YES ONLINTGT
Default setting. The path group is checked. The relationship is not
established when the copy target is online. NO
Establish a relationship including all the tracks in the volume. If you specify
YES for this parameter and COPY for the MODE parameter, the YES INCREMENTAL
relationship will be maintained even after the background copying process
is completed, and the differential data between the S-VOL and the T-VOL
will be managed. As long as the relationship is maintained, you cannot
update the T-VOL.
The differential data between the S-VOL and the T-VOL will be copied
when you execute the FCESTABL command with INCREMENTAL parameter
specified or you execute the FCESTABL command (Reverse Restore) with
the S-VOL and the T-VOL reversed.
Relationship will be deleted after background copying completes. The
default setting of this parameter is NO. NO
Establishing relationships for Compatible FlashCopy 43