Hitachi ShadowImage for z/OS user guide (HIT9503-96009, January 2008)

NOTE:
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 more information on the settings of the pairresync operation, see section
“Resynchronize Pair Operations (Normal, Quick, Reverse, Quick Restore)” on page 30.
NOTE:
When you delete a pair, the pair status changes to simplex. You cannot delete a pair where the status
is V-Split.
Table 7 Pair Sta
tusversusAllowableOperations
Pair Status
Operation
Sim-
plex
Pend-
ing
Duplex SP-Pend V-Split Split
Resync Resync-R
Sus-
pend
Add Pair
OK
xxxxxxxx
Split Pair
OK OK OK
xxxxxx
Suspend Pair
x
OK OK OK OK OK OK
xx
Resync Pair
xxxx
OK OK
xx
OK
Reverse
Copy
Quick
Restore
xxxxx
OK
xxx
Delete Pail
x
OK OK OK
x
OK OK OK OK
Table 8 Siz P
air Status
Status Description Host Status S-VOL Access T-VOL Access
Simplex
The volume is
not assigned to
aSizpair. The
XP12000 storage
system accepts
read and write
I/Os for all simplex
volumes which are
not reserved.
S-VOL = SIMPLEX
T-VOL = SIMPLEX
N/A (there is no
S-VOL yet)
N/A (there is no
S-VOL yet). If the
volume is reserved
as a T-VOL, the
storage system
does not accept
read and write
I/Os. Read/write
access enabled
for HRX volumes.
Avoid read/write
operations.
Pending
The initial copy
operation is in
progress. No
update copy
operations are
performed.
S-VOL = PPRI-PNDG
T-VOL = PSEC-
PNDG
Read/write
enabled
Read/w
rite-
disabl
ed.
Read/w
rite access
enabl
ed for
HRX vo
lumes.
Avoid
read/write
oper
ations.
44
Overview of Hitachi ShadowImage for z/OS Operations