HP XP Business Copy Software - Manual (Page 23)

Table 2 XP Business Copy Pair Status (continued)
S-VOL Access Description Pair Status
Read only. The pairresync operation has been accepted normally. The
pairresync operation triggers a copy operation.
1
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 the entire P-VOL to the S-VOL. No
update copy operations are performed during the
pairresync operation.
COPY(RS)
Read only. The reverse pairresync operation has been accepted
normally. The reverse pairresync operation triggers a copy
operation.
1 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.
COPY(RS-R)
Read only. The 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. PSUE
1 It may take time until the copy starts, because the starting time of the copy depends on the number of pairs and the
system environment.
XP Business Copy Options
You can use the options shown in Table 3 (page 23) for XP Business Copy operations.
Table 3 Types of XP Business Copy Options
Requirement Features Option Type
You must change the storage system
setting to allow the quick restore
operation. Swap&Freeze option suppresses the update copy. For
details, see
“Swap&Freeze Option” (page 23) .
Swap&Freeze
- Host I/O Performance option suppresses the copy
operations by XP Business Copy. For details, see
“Host
I/O Performance Option” (page 24) .
Host I/O
Performance
- Copy Threshold option temporarily stops the copy operation
of XP Business Copy. For details, see
“Copy Threshold
Option” (page 24) .
Copy Threshold
Available option types depend on the storage system settings.
Swap&Freeze Option
The Swap&Freeze option allows the S-VOLs of an XP Business Copy pair to remain unchanged
after the quick restore operation. If the quick restore operation is performed on an XP Business
Copy pair with the Swap&Freeze option, update copy operations are suppressed and not performed
for pairs in the PAIR status after the quick restore operation. If the quick restore operation is
performed without the Swap&Freeze option, the P-VOL and S-VOL are resynchronized when update
copy operations are performed for pairs in the PAIR status.
Make sure that the Swap&Freeze option remains in effect until the pair status changes to PAIR after
the quick restore operation.
XP Business Copy Options 23