C adjusting volume capacity for copy pair setting – HP StorageWorks XP Remote Web Console Software User Manual
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C Adjusting volume capacity for copy pair setting
When creating an XP Business Copy or XP Flex Copy pair, the S-VOL's capacity must be the same
as the P VOL. To set a copy pair's desired volume, you might need to adjust the volume capacity.
This section describes the procedure to adjust the volume capacity.
Copying data from external arrays (using external LUs as P-VOLs)
For A, B, and C in the following description, see
.
To adjust the volume capacity to create a pair:
1.
Map the external LU (A) as an internal LDEV (B) of the local array. Ensure that the volume's
emulation type is OPEN-V.
2.
Select the local array volume (C) with the same capacity as the mapped internal LDEV (B) or
a bigger capacity than the mapped internal LDEV (B). The volume's (C) emulation type must
be OPEN-V.
3.
If you select the local array volume (C) with a bigger capacity than the mapped internal LDEV
(B), create the CV with the same capacity as the mapped internal LDEV (B) out of the local
array volume (C) using Volume Manager. For more information, see the HP XP LUN
Configuration and Security Manager user guide: HP XP12000 Disk Array, HP XP10000 Disk
Array, HP 200 Storage Virtualization System.
NOTE:
When using Volume Manager to create a CV with the same capacity as the mapped
internal LDEV (B), specify the CV's capacity according to the Blocks capacity displayed in the
Capacity column on the LDEV Information pane in XP External Storage (see
external LU's status (LDEV Information)
).
NOTE:
To create an XP Continuous Access pair with a volume of an XP1024/XP128 Disk
Array, you might not be able to create a CV with the same capacity as the internal LDEV (B)
because Volume Manager does not allow you to specify the capacity in blocks. In this case,
you cannot create an XP Continuous Access pair.
4.
Create a copy pair.
Figure 72 Copying data from external arrays (using external LUs as P-VOLs)
Copying data to external arrays (setting external LUs as S-VOLs)
For A, B, and C in the following description, see
To adjust the external LU's capacity to create a pair:
1.
Map the external LU (A) as an internal LDEV (B) of the local array. Set the emulation type to
the same as the copy source volume (C).
164 Adjusting volume capacity for copy pair setting