3 requirements and overview of copy operations, Requirements and overview, Of copy operations – HP StorageWorks XP Remote Web Console Software User Manual
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Requirements and overview of copy operations
You can use Flex Copy XP to create a pair consisting of a copy source volume and a copy destination
volume, so data is copied from the copy source volume to the copy destination volume.
The copy source volume is called the primary volume (P-VOL). The copy destination volume is called the
secondary volume (S-VOL).
When using Flex Copy XP to perform copy operations, all data in the copy source volume (P VOL) is
copied to the copy destination volume (S-VOL).
This chapter explains requirements for performing Flex Copy XP operations and gives an overview of copy
operations.
Requirements for volumes that can be used as copy pairs
This section explains requirements for volumes that can be set as the copy source volume (P VOL) and copy
destination volume (S-VOL) for a Flex Copy XP pair. For instructions on adjusting the volume capacity to set
the volume as a P-VOL or S-VOL, see ”
Adjusting volume capacity for copy pair settings
Requirements for volumes that can be used as the P-VOL or X-VOL are:
•
You can use only volumes of CU group 0 (whose CU:LDEV number is between 00:00 and 3F:FF) for
Flex Copy XP operations.
•
When specifying the P-VOL and S-VOL for a Flex Copy XP copy pair, you must specify a volume in the
local array and an external LU mapped to a volume in the local array.
•
For Flex Copy XP copy operations, you must set the IO Suppression mode to Enable when mapping the
external LU.
•
The emulation type for the P-VOL and S-VOL must be OPEN-V. When mapping an external LU as an
internal LU, you must set the emulation type to OPEN-V.
•
The P-VOL and S-VOL must be offline from the host.
•
If you want to use the S-VOL for operations other than Flex Copy XP operations, you must cancel the
copy pair first.
•
The P-VOL and S-VOL must be in Normal status.
•
The P-VOL’s capacity and the S-VOL’s capacity must be the same. The volume capacity must be within a
range of approximately 47 MB (96,000 blocks) to 2 TB (4,294,967,296 blocks).
•
The total capacity of the P-VOL and S-VOL must not exceed the capacity licensed for Flex Copy XP.
•
You cannot use volumes set for Continuous Access XP as copy pair volumes for Flex Copy XP
operations.
•
You cannot use volumes set for Business Copy XP as copy pair volumes for Flex Copy XP operations.
•
You cannot use volumes set for Auto LUN XP as copy pair volumes for Flex Copy XP operations.
•
You cannot use volumes set as reserve volumes for Auto LUN XP and Business Copy XP as copy pair
volumes for Flex Copy XP operations.
•
You cannot use volumes specified as Continuous Access XP Journal data or journal volumes as copy
pair volumes for Flex Copy XP operations.
•
You cannot use volumes specified for Snapshot XP as volumes for copy pairs for Flex Copy XP
operations.
•
You cannot use volumes specified as virtual volumes (V-VOLs) or pool volumes (pool-VOLs) as volumes
for copy pairs for Flex Copy XP operations.
•
You cannot use NAS system volumes as Flex Copy XP S-VOLs.
•
You cannot use volumes configured as command devices, which are reserved for use by hosts, as Flex
Copy XP P-VOLs and S-VOLs.