Returning Production To Local Site After Planned Outages - IBM DS8000 User Manual

Table 4. Failover and failback implementation (continued)
Step Operation
Disaster at Failover
Site A
2 (Site A volumes must be in a suspended state)
Return Failback
production
to Site A
3a (Site B volumes must be in a suspended state)
Return to Failback
production
(Site B)
Note: If Site
A is still not
operational;
production
can
continue at
Site B.
3b (prepare Failover
to return to
production
(Site A)
from
production
(Site B)
3c (Site A volumes must be in a suspended state)
Return to Failback
production -
Site A

Returning production to local site after planned outages

After restoring operations at Site B, you can schedule a failback operation to
synchronize data and to enable production to resume at your original site, Site A.
Before you run a failback operation, you must create paths from Site B to Site A
between the specific LSSs.
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DS8000 User's Guide
Format of source
MC connectivity volume and
required to target volume
Site B Volume B,
Volume A
Site A Volume A,
Volume B
Site B Volume B,
Volume A
Site A Volume A,
Volume B
Site A Volume A,
Volume B
Format of
source and
target
volume
pair Result: Site A
Volume B1 : Volume A1 ->
Volume A1 Volume B1
(Suspended)
The volume
pair might
display as full
or pending
duplex state if
host write
operations
have stopped.
Volume A1 : Volume A1 ->
Volume B1 Volume B1
Volume B1 : Volume B1 ->
Volume A1 Volume A1
Volume A1: Volume A1 ->
Volume B1 Volume B1
Volume A1: Volume A1 ->
Volume B1 Volume B1
Result: Site B
Volume B1 ->
Volume A1
(Suspended)
Volume A1 ->
Volume B1
Volume B1 ->
Volume A1
Volume B1 ->
Volume A1
(Suspended
state; the
volume pair
might display
full or pending
state if host
write operations
have stopped.)
Volume A1 ->
Volume B1