HP StorageWorks Business Copy XP user guide for the XP128/XP1024 (December 2005)

Business Copy XP user guide for the XP128/XP1024 27
• “MU#” in Figure 7 means MU number, which identifies each MU. MU#=1 under S-VOL1 means the
MU number of the P-VOL that is paired with the S-VOL1 is 1.
Table 8 shows the relationship between the L2 pair status and availability of pair operations on the
associated L1 pairs. (CMD RJT = command rejected.) If you delete an L1 pair containing an L2 pair, the L2
pair becomes the L1 pair.
The read/write operation to each volume (root, node, or leaf) from the host is enabled or disabled
depending on the status of L1/L2 pairs. The read/write operation from the host can always be performed
to the root volume regardless of the status of L1/L2 pairs. Table 9 shows the relationship between
Table 7 Relationship between L1 pair status and L2 pair operations
L1 Pair
Status
L2 Pair Operations
Paircreate Pairsplit Pairresync Reverse/
Quick Restore
Pairsplit-E Pairsplit-S
COPY(PD) OK NO
(CMD RJT)
OK NO
(CMD RJT)
OK OK
PAIR OK NO
(CMD RJT)
OK NO
(CMD RJT)
OK OK
COPY(SP) OK NO
(CMD RJT)
OK NO
(CMD RJT)
OK OK
PSUS(SP) OK NO
(CMD RJT)
OK NO
(CMD RJT)
OK OK
PSUS OK OK OK NO
(CMD RJT)
OK OK
COPY(RS) OK NO
(CMD RJT)
OK NO
(CMD RJT)
OK OK
COPY(RS-R) OK NO
(CMD RJT)
OK NO
(CMD RJT)
OK OK
PSUE OK NO
(CMD RJT)
OK NO
(CMD RJT)
OK OK
Table 8 Relationship between L2 pair status and L1 pair operations
L2 Pair
Status
L1 Pair Operations
Paircreate Pairsplit Pairresync Reverse/
Quick Restore
Pairsplit-E Pairsplit-S
COPY(PD) OK
1
,
2
1. MU# of L2 node pair member must be 1 or 2.
2. Not displayed by the array management interface.
OK OK OK OK OK
PAIR OK
1, 2
OK OK OK OK OK
COPY(SP) NO
2
(CMD RJT)
NO
2
(CMD RJT)
NO
(CMD RJT)
NO
(CMD RJT)
OK OK
PSUS(SP) NO
2
(CMD RJT)
NO
2
(CMD RJT)
NO
(CMD RJT)
NO
(CMD RJT)
OK OK
PSUS OK
1, 2
OK OK OK OK OK
COPY(RS) OK
1, 2
OK OK OK OK OK
PSUE OK
1, 2
OK OK OK OK OK