HP StorageWorks XP Remote Web Console Software - Manual (Page 73)

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The Select Split Type list allows you to select the split type (from Quick Split or Steady Split)
for all the pairs that you are splitting.
Table 30 (page 73) lists read/write operations from the host servers to the volumes during
the split pair operation.
Table 30 Operations from the Host Servers during the Split Pair Operation
Steady Split Quick Split Volumes Operations
Both areas which are not copied and areas which are already copied can
be read as usual. S-VOL Read
Cannot be read. Read processing will
finish abnormally. The areas which are already copied
can be read as usual. T-VOL
If the host server tries to read the
area which is not copied yet, firstly
ShadowImage for Mainframe copies
that area from the S-VOL, and then
the host server will read the area
after the copy operation completes.
Therefore, the result will be the same
as when the host server reads the
area which is already copied.
Write operation for the area which is already copied to the T-VOL is
performed normally. S-VOL Write
If the host server tries to write data to the area which is not copied yet, new
data will be written after the old data is copied to the T-VOL. S-VOL data
during the split operation will therefore be copied to the T-VOL for sure.
Cannot be written. Write processing
will finish abnormally. The areas which are already copied
can be written as usual. T-VOL
If the host server tries to write data
to the area which is not copied yet,
firstly ShadowImage for Mainframe
copies that area from the S-VOL,
and then the host server will write
data to the area after the copy
operation completes. Therefore, the
result will be the same as when the
host server writes data to the area
which is already copied.
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The Select T-VOL box allows you to filter the T-VOLs displayed in the T-VOL List on the right.
The LDKC list allows you to select the LDKC of the T-VOL. ◦
◦ The CU list allows you to select the CU image of the T-VOL.
◦ The Volume Type box:
The Internal VOL check box allows you to select the available T-VOLs that are internal
volumes. –
– The External VOL check box allows you to select the available T-VOLs that are external
volumes. Note that you need the XP External Storage features to select the external
volumes.
◦ The Reserved check box allows you to display reserved or unreserved volumes. If you
select the Reserved check box, only reserved volumes are displayed in the Volume List.
If you select the Not Reserved check box, only unreserved volumes are displayed.
The number of secondary volumes that can be displayed in the T-VOL List at a time is
limited to 1,024 volumes. In case the number of volumes defined in the storage system
Splitting Pairs 73