Hitachi ShadowImage for Mainframe User Guide: HP XP24000 Disk Array, HP XP20000 Disk Array (T5213-96032, May 2011)

is complete, the pair status changes to split, and you can access the split T-VOL. The
update copy operation is not performed on the pairs which status is split.
• If the HP disk array cannot maintain duplex status for any reason, or if you suspend the
pair, the pair status changes to suspend.
4. When you start a pairresync operation, the pair status changes to resync or resync-r. When
the pairresync operation is complete, the pair status changes to Duplex.
When you specify reverse or quick restore mode for a pairresync operation, the pair status changes
to resync-r (data is copied in the reverse direction from the T-VOL to the S-VOL). For details on the
settings of the pairresync operation, see “Resynchronize Pair Operations” (page 15).
When you delete a pair, the status of the volumes that were used by that pair changes to Simplex.
You cannot delete the pair which status is V-Split.
Table 2 (page 22) lists and describes the SIz pair status conditions.
Table 2 ShadowImage for Mainframe Pair Status
T-VOL AccessS-VOL AccessHost StatusDescriptionStatus
N/A (there is no
T-VOL yet).
If the volume is
reserved as a T-VOL,
the storage system
does not accept read
and write I/Os.
N/A (there is no
S-VOL yet).
S-VOL = SIMPLEX
T-VOL = SIMPLEX
The volume is not
assigned to an SIz
pair. The XP storage
system accepts read
and write I/Os for all
simplex volumes that
are not reserved.
Simplex
Read/write-disabledRead/write-enabledS-VOL = PPRI-PNDG
T-VOL = PSEC-PNDG
The pair create
operation has been
accepted normally.
The initial copy
operation is
executed.
1
No update
copy operations are
performed.
Pending
Read/write-disabledRead/write-enabledS-VOL = PPRIMARY
T-VOL = PSECONDRY
The initial copy
operation is complete,
and the XP storage
system starts
performing
asynchronous update
copy operations from
the S-VOL to the T-VOL
as needed. The S-VOL
and T-VOL of a duplex
pair may not be
identical.
Duplex
22 About ShadowImage for Mainframe Operations