You must assign a volume (namespace) to a host or host cluster so it can be used for I/O operations. This assignment grants a host
or host cluster access to one or more namespaces in a storage array.
About this task
Keep these guidelines in mind when you assign volumes:
- You can assign a volume to only one host or host cluster at a time.
- Assigned volumes are shared between
controllers in the storage array.
- The same namespace ID (NSID) cannot be used
twice by a host or a host cluster to access a volume. You must use a
unique NSID.
Assigning a volume
fails under these conditions:
- All volumes are assigned.
-
The volume is already assigned to another
host or host cluster.
The ability to assign a
volume is unavailable under
these conditions:
- No valid hosts or host clusters exist.
- All volume assignments have been
defined.
All unassigned volumes are displayed, but functions for hosts with or without Data Assurance (DA) apply as follows:
- For a DA-capable host, you can select volumes that are either DA-enabled or not DA-enabled.
- For a host that is not DA-capable, if you select a volume that is DA-enabled, a warning states that the system must automatically turn off DA on the volume before assigning the volume to the host.