HP StorageWorks XP24000 Continuous Access Software User and Reference Guide, v01 (T5278-96002, June 2007)

Table 14 Pair Status and Availability of Data Retention Utility Operation
Volume Volume Data Retention Utility Operations
Changing Access At tribute
Referencing Access Attribute
P-VOL
SMPL
OK OK
COPY
*
1
OK
PAIR
*
1
OK
PSUS OK OK
PSUE OK OK
S-VOL SMPL OK OK
COPY
No
OK
PAIR No
OK
PSUS No*
2
OK
PSUE
No
OK
*1: See Table 15 on page 39.
*2: If the Write option is set to the S-VOL, the access attribute can be changed.
When the
P-VOL is in the COPY or PAIR status, there are two access attributes which can be changed and
cannot b e changed depending o n the existing access attribute. For details, see Table 15 on page 39.
Table 15 Variable Access Attribute (Pair Status of Continuous Access P-VOL is PAIR
or
COPY)
Access Attribute
before Change
Variable Access Attribute
Read/Write
Read Only
Protect
S-VOL Disable
Read/Write
-
No No
OK
Read Only
OK
-
OK OK
Protect
OK OK
-
OK
S-VOL Disable
OK
No No
-
LUN Expansion
LUSE volumes can be assigned to 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
Continuous Access P-VOL or S-VOL, you must release the pair first to return the volume to SMPL status.
F or further information on LUN Expansion (LUSE), see the HP StorageWorks XP24000 LUN Expansion
User’s Guide.
Note: If you allocate a LUSE volume that consists of LDEVs set across more than one CU to the Continuous
Access pair, you must select CU Free for an RCU (see “Adding an RCU” on page 71). A LUSE volume
that
consists of LDEVs set across more than one CU cannot create a pair with the volume of a Lightning
9900V because CU Free cannot be added as an RCU with a Lightning 9900V.
Virtual LVI/L UN
Virtual LVI/LUN volumes can be assigned to Continuous Access pairs, provided that the S-VO L has the
same capacity as the P -VOL. If you need to perform Virtual LVI/LUN op erations on an existing Continuous
Access P-VOL or S-VOL, you must release the pair first to return the volume to SMPL status.
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