Maximizing Efficiency Through Data Replication Manager Data Movement Application Notes

Procedures and Examples
Application Notes - Maximizing Efficiency Through Data Replication Manager Data Movement 33
1 Remove the target LUN from the remote copy set.
2 Delete the small target LUN and create the larger LUN.
3 Add the new target LUN to the remote copy set.
NOTE: The initiator and target site volumes must be nearly the same size.
4 Prevent the host I/O from accessing the initiator LUN.
5 Perform a failover to the target-site controller.
6 Remove the remote copy set and any remnants that reference the LUNs in the remote copy set.
7 Delete the old initiator LUN and create your new initiator LUN using the old LUN name.
8 Create a new remote copy set between the target and initiator LUNs and allow a normalization to
occur.
9 Perform a failback.
- Allow host I/O access to the initiator LUN.
Figure 12: Migrating from one data set to another
1
2
4
7
5
6
Host A
HSG80
HSG80
Host B
Remove
target LUN
CXO7692A
JBOD
D1
Larger JBOD
D1
Delete
smaller LUN
and create
new LUN
Remove RCS
and remnants
Failover
to target
10
9
Failback
BuildngA (Initiator) BuildngB (Target)
D1
Switch
Switch
Add new target
LUN to RCS
3
27 GB
9 GB
27 GB
9 GB
Host A
HSG80
HSG80
Host B
JBOD
D1
Larger
JBOD
D1
Larger
JBOD
D1
D1
Switch
Switch
27 GB
9 GB
27 GB
Host A
HSG80
HSG80
Host B
Larger
JBOD
D1
Switch Switch
27 GB
27 GB
Create
larger LUN
8
Create RCS
and normalize
Larger
JBOD
D1
Host A
HSG80
HSG80
Host B
Larger
JBOD
D1
Switch Switch
27 GB
27 GB
Allow host
access
I/O I/O
I/O I/O
I/O I/O
I/O I/O