HP StorageWorks XP24000 Business Copy Software User's Guide (T5213 - 96001, June 2007)

• When you specify Reverse Copy or Quick Restore mode for a pairresync operation, the pair
status changes to COPY(RS-R).
• When you delete a pair (pairsplit-S), the status of the volumes that were used by the pair changes
to SMPL. Note that you cannot delete the pair that has status PSUS(SP).
Table 2 on page 26 lists and describes the Business Copy pair status conditions.
Table 2 Business Copy Pair Status
Pair Status Description S-VOL Access
SMPL
Thevolumeisnot assigned to aBusinessCopypair. Thestorage
system accepts read and write I/Os for all SMPL volumes that are
not reserved.
N/A (there is no
S-VOL yet).
COPY(PD)
The initial copy operation is in progress. The storage system
continues to accept read and write operations for the P-VOL but
stops accepting write operations for the S-VOL. No update copy
operations are performed.
Read only.
PAIR
The initial copy operation is complete, and the storage system starts
performin
g asynchronous update copy operations from the P-VOL
to the S-VOL as needed. The P-VOL and S-VOL of a duplex pair
(PAIR status) may not be identical.
Read only.
COPY(SP)
The status becomes COPY(SP) when the steady split mode is selected
for the pairsplit operation. All P-VOL updates prior to the pairsplit
command are being copied to the S-VOL. When these updates are
complete, the split S-VOL is identical to the state of the P-VOL when
the split started.
Read only.
PSUS(SP)
The status becomes PSUS(SP) when the quick split mode is selected
for the pairsplit operation. Only the P-VOL differential data is being
copied to the S-VOL in background. The PSUS(SP) pairs cannot
be deleted.
Read and write.
The S-VOL can be
mounted.
PSUS
The st
orage system stops performing update copy operations for
PSUS (split) pairs, and starts accepting write I/Os for PSUS S-VOLs.
The st
orage system keeps track of all updates to the split P-VOL and
S-VO
L, so that the pair can be resynchronized quickly.
Read and write.
The S-VOL can be
mounted.
COPY(RS)
The storage system does not accept write I/Os for COPY(RS) S-VOLs.
When a split pair is resynchronized in normal mode, the storage
system copies only the P-VOL differential data to the S-VOL. When a
PSUE (suspended) pair is resynchronized, the storage system copies
theentireP-VOL to theS-VOL.Noupdatecopyoperationsare
performed during the pairresync operation.
Read only.
COPY(RS-R)
The storage system does not accept write I/Os for COPY(RS-R)
S-VOLs. When a split pair is resynchronized in reverse or quick
restore mode, the storage system copies only the S-VOL differential
data to the P-VOL. No update copy operations are performed during
the reverse or quick restore pairresync operation.
Read only.
PSUE
Th
e storage system continues accepting read and write I/Os for
a PSUE (suspended) P-VOL, but does not perform update copy
operations to a PSUE S-VOL. The storage system marks the entire
P-VOL track map as difference data, so that the entire P-VOL is
copied to the S-VOL when the PSUE pair is resumed. Use the
pairresync command to resume a PSUE pair.
Read only.
Business Copy Options
You can use the options in Table 3 on page 27 for Business Copy operations.
26
About Business Copy Operations