HP StorageWorks XP24000/XP20000 Continuous Access Software User Guide (T5278-96049, November 2011)
Table 17 Access Attribute and Availability as a Volume of an XP Continuous Access Pair
Availability as a Volume of an XP Continuous Access PairAccess Attribute
S-VOLP-VOL
OKOKRead/Write
OKOKRead Only
OKOKProtect
NOOKS-VOL Disable
NOOKRead Only and S-VOL Disable
NOOKProtect and S-VOL Disable
The availability of Data Retention Utility operations for changing the access attribute depends on
the XP Continuous Access pair status. For details, see Table 18 (page 44).
Table 18 Pair Status and Availability of Data Retention Utility Operation
Data Retention Utility OperationsPair StatusVolume
Referencing Access AttributeChanging Access Attribute
OKOKSMPLP-VOL
OKOKCOPY
OKOKPAIR
OKOKPSUS
OKOKPSUE
OKOKSMPLS-VOL
OKNoCOPY
OKNoPAIR
OKNo
1
PSUS
OKNoPSUE
1
If the Write option is set to the S-VOL, the access attribute can be changed.
LUN Expansion
LUSE volumes can be assigned to XP Continuous Access pairs, provided that the P-VOL and S-VOL
have the same LU type and the same number of LDEVs. If you need to perform LUSE operations
on an existing XP Continuous Access P-VOL or S-VOL, you must release the pair first to return the
volume to SMPL status.
For further information on LUN Expansion (LUSE), see the HP XP24000/XP20000 LUN Expansion
User Guide.
If you allocate the LUSE volume that consists of LDEVs set across more than one CU to the XP
Continuous Access pair, you must select CU Free for an RCU. The LUSE volume that consists of
LDEVs set across more than one CU cannot create a pair with the volume of an XP1024/XP128
disk array because CU Free cannot be added as an RCU with XP1024/XP128 disk arrays.
Custom Volume Size
CVS volumes can be assigned to XP Continuous Access pairs, provided that the S-VOL has the
same capacity as the P-VOL. If you need to perform CVS operations on an existing XP Continuous
Access P-VOL or S-VOL, you must release the pair first to return the volume to SMPL status.
44 About XP Continuous Access Operations