Hot and Cold subsystem Relocation
There are two methods you can use to move subsystems: hot subsystem relocation and cold subsystem
relocation.
Note:
For more detailed information about relocating subsystems, see one of the following documents:
v
DS3000
:
IBM System Storage DS3000 Installation, User's and Maintenance Guide
v
DS4000 / DS5000
:
IBM System Storage DS4000/DS5000 Hard Drive and Storage Expansion Enclosure
Installation and Migration Guide
v
Hot subsystem relocation lets you add or move storage without reconfiguring the storage subsystem
and, in some cases, without rebooting. During hot subsystem relocation, the storage subsystem power
is not turned off.
v
Cold subsystem relocation requires that the power to the source storage subsystem and the destination
storage subsystem be turned off before moving the subsystems from one storage subsystem to another.
Then the power to the storage subsystems can be turned on.
To ensure that any subsystem being moved to a different destination storage subsystem is correctly
recognized and managed by the new storage subsystem, use hot subsystem relocation whenever possible.
Attention:
Possible loss of data access
– You must move a single subsystem at a time, and it must go
into a storage subsystem with the same level of controller firmware.
Basic Process Steps
Relocating an subsystem from one storage subsystem to another includes these procedures:
1.
Verifying the status of the storage subsystems
2.
Ensuring that both storage subsystems have the latest controller firmware versions installed
3.
Locating the drives in the subsystem
4.
Placing the subsystem offline
5.
Removing drives from the storage subsystem
6.
Replacing an subsystem into the new storage subsystem
Attention:
Check firmware versions
– Ensure that both existing and new storage subsystems have the
latest controller firmware versions installed.
v
See the IBM Disk Support website to find the latest firmware versions for your storage subsystems:
www.ibm.com/systems/support/storage/disk
v
Also check the following documentation for more information:
–
DS3000
:
IBM System Storage DS3000 Installation, User's and Maintenance Guide
–
DS4000 / DS5000
:
IBM System Storage DS4000/DS5000 Hard Drive and Storage Expansion Enclosure
Installation and Migration Guide
To perform these steps, you must be familiar with the following CLI commands. The command syntax is
provided to assist in your use of these new commands.
subsystem Relocation Commands
Note:
subsystem relocation commands are supported with the following controller firmware only:
v
DS5000
: 07.30.xx.xx
v
DS4000
: 07.1x.xx.xx
v
DS3000
: Not supported.
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