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

About ShadowImage™ for IBM
®
z/OS
®
Operations 2-13
Hitachi ShadowImage™ for IBM
®
z/OS
®
User’s Guide
Duplex
S-VOL
T-VOL
Resynchronized
Resync-R
S-VOL
T-VOL
Write Data
Host
A
ccess permitted
Host
A
ccess inhibited
A
ccess inhibited
A
ccess inhibited
Legend
: Time flow
: Data
Figure 2-7 Backward Pairresync Operations
Notes:
– The S-VOL remains fully accessible during a normal/quick resync
operation, but becomes inaccessible to all hosts during a reverse copy
or quick restore operation.