Chapter 7. Advanced maintenance, troubleshooting, and diagnostics 377
– Volume copy source or target logical drive
– Mirror primary or secondary logical drive or mirror repository logical drive
The array being migrated must have no mappings assigned.
We recommend installing the latest applicable levels of firmware in both the source and
destination DS storage subsystems.
In addition:
Check the IBM System Storage DS4000/DS5000 Hard Drive and Storage Expansion
Enclosure Installation and Migration Guide, GC53-1139 for additional considerations.
Do not migrate from a DS storage subsystem with a newer firmware level than the
destination.
Make sure that your source and destination DS storage subsystems have unique array
names and logical drives names.
In addition to these prerequisites, there are additional distinct considerations specifically for
the source and for the destination DS storage subsystems.
Source DS storage subsystem prerequisites
On the source storage subsystem, perform the following actions before starting the export
operation:
Save the storage subsystem configuration and profile data. This is a precaution to help
you restore your configuration in the event of a problem during the export. Make sure to
save both the configuration and profile files outside of the DS storage subsystem.
Stop all associated I/Os. Stop all input and output and un-mount or disconnect file systems
on the logical drives in the array selected for export.
Back up array data. Back up data on the logical drives in the array selected for export, and
verify the backup. Make sure that you save the backup outside of the DS storage
subsystem disks.
Make sure that the hard disk drive firmware is the latest applicable level.
Locate the array and label drives. Use the locate array function to flash the LEDs on the
drives in the array, and then label them with the source and destination storage subsystem
names, array name, and total number of drives in the array.
If you continue using the source enclosure expansion, obtain blank drive canisters or new
drives, because after you remove the drives in the array, you must replace them with blank
drive canisters or new drives to maintain proper airflow within the enclosure.
Destination DS storage subsystem prerequisites
On the destination storage subsystem, be sure of the following items:
Verify the available drive slots. Be sure that you have enough empty slots for the drives
you will be importing.
Important: Before you attempt to complete the drive migration procedure, review the
information provided in the latest IBM System Storage DS4000/DS5000 Hard Drive and
Storage Expansion Enclosure Installation and Migration Guide, GC53-1139.
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