Hitachi ShadowImage for IBM z/OS User"s Guide (T5213-96002, June 2007)

About ShadowImage™ for IBM
®
z/OS
®
Operations 2-15
Hitachi ShadowImage™ for IBM
®
z/OS
®
User’s Guide
Pair Status
Figure 2-8 illustrates the pair status transitions and the relationship between
the pair status and the SIz operations.
Reserved
Volume
1. Simplex
T-VOL S-VOL
2.
A
dd Pai
r
Initial copy (Pending)
T-VOL S-VOL
3. Duplex
A
fter the initial cop
y
completed, S-VOL and
T-VOL synchronize b
y
update copy.
T-VOL S-VOL
4. Split
Split Pair (SP-Pend or V-Split)
Resync Pair (Resync or Resync-R)
T-VOL S-VOL
5. Duplex
A
fter the pair resynchronize
operation completed, S-VO
L
and T-VOL synchronize b
y
update copy.
T-VOL S-VOL
4. Suspend
Res
y
nc Pair
(
Res
y
nc
)
Sus
p
end Pai
r
: Duplex
: Split
: Suspend
Legend:
: Change of status
Figure 2-8 ShadowImage for z/OS Pair Status Transitions