IBM System Storage DS6000 Series: Copy Services in Open Environments

Appendix B. Copy Services with System i5 543

Figure B-45 falovrgmir

3. While executing this command, the Toolkit performs the following actions:

a. Run chkpprc command.

b. Vary off the IASP at the local partition.

c. Fail over Global Copy to the remote site.

d. Check the revertible status of the volumes at the remote site and programmatically

create the correct scripts to reverse FlashCopy on the remote volumes.

e. Reverse FlashCopy on the remote volumes.

f. Vary on the IASP on the Global Mirror secondary volumes to the remote partition.

4. Once the command falovrgmir has been executed, the production application continues

to run in the remote partition with the Global Mirror copy of the IASP.

Switch back to local site after unplanned outages

Failback to the local partition is achieved by running DS CLI scripts, which are contained in

the Toolkit.

Metro Mirror for the entire disk space

In this section, we discuss Metro Mirror for a System i5 partition’s entire disk space. We also

assume that Boot from SAN (BfS) is used for both local and remote partitions.

For more information about Metro Mirror, refer to Part 4, “Metro Mirror” on page 109. For more

information about Boot from SAN, refer to the redbook IBM System Storage DS6000 Series:

Architecture and Implementation, SG24-6781.

Solution description

Because of the System i5 single-level storage architecture, it is required that all disk units for

the local partition reside on external storage and that all of them are replicated (with Metro

Mirror) to the remote site.

In the solution that we review here, the load source is an external disk, connected through the

Boot from SAN IOP, and also replicated to the remote site using Metro Mirror. We assume

that the standby partition in the System i5 (recovery partition) at the remote site has access to

Global Mirroring Failover (FALOVRGMIR)

Type choices, press Enter.

Environment name . . . . . . . . gmir Character value

Bottom

F3=Exit F4=Prompt F5=Refresh F12=Cancel F13=How to use this display

F24=More keys

Parameter ENV required.