HP XP Racks User Manual
Page 67
S-VOL access
P-VOL access
Host status
Description
Pair status
Read and
write. Can be
varied online.
Read/write-enable
P-VOL = “PPRI-PNDG”
S-VOL = Unpaired
The pair is in the process of being
Quick Split. The differential data is
copied to the S-VOL only in the
background.
V-Split/SUSPVS
For more information about the Quick
Split method of splitting pairs, see
Read and
write. Can be
varied online.
Read/write
enabled
P-VOL = “PPRI-PNDG”
S-VOL = Unpaired
The pair has been split. The XP7
storage system stops performing update
copy operations from the P-VOL to the
Split/SUSPOP
S-VOL. Write I/Os are accepted for
S-VOL. The XP7 storage system keeps
track of updates to split P-VOL and
S-VOL so that you can Quick Resync.
Read/write
disabled
Read/write
enabled
P-VOL = “PPRI-PNDG”
S-VOL = “PSEC-PNDG”
The pairresync RAID Manager
command is in progress. The XP7
storage system does not accept write
Resync/PENDING
I/Os for S-VOL and does not perform
update copy operations.
For more information about
resynchronizing pairs, see
Read/write
disabled
Read/write
disabled
P-VOL = “PPRI-PNDG”
S-VOL = “PSEC-PNDG”
The reverse pairresync RAID
Manager command is in progress. The
XP7 storage system copies only S-VOL
Resync-R/REVRSY
differential data to the P-VOL. The XP7
storage system does not perform
update copy operations during the
Reverse Copy or Quick Restore. Write
I/O operations to the S-VOL are
rejected.
Read/write
disabled
Read/write
enabled
P-VOL = “PPRI-PNDG”
S-VOL = “PSEC-PNDG”
The XP7 storage system does the
following:
Suspend/SUSPER
•
Suspends the pair.
•
Continues accepting read and write
I/Os to the P-VOL.
•
Stops update copy operations to the
S-VOL.
•
Marks the P-VOL as differential
data. Resynchronizing a pair copies
the P-VOL to the S-VOL.
The status of other pairs sharing the
same P-VOL does not change.
Data consistency is not ensured in this
status.
For more information about ensuring
data consistency, see
ensuring data consistency” (page 49)
.
* Starting time of the copy depends on the numbers of pairs and the system environment.
CAUTION:
Running the DEVSERVE command to a read/write disabled volume returns the
“INTERVENTION REQUIRED” message. To return a normal value, create the pairs with the volumes
online before running the command.
Monitoring the Business Copy Z system
67