BWN004834E
The Storage Partitions configuration operation failed because it attempted to use a LUN that is already used in a different volume mapping.
Explanation:

Firmware requires that the set of shared mappings associated with a protocol controller always be shared as a complete unit. A protocol controller cannot share one portion of its mappings with one protocol controller and another portion with another protocol controller. In other words, any volume/lun mapping which is uniquely assigned to a Clustered Protocol Controller with unique mappings cannot be attached to any protocol controller other than the one with which its host specific protocol controller already shares mappings. It is illegal to attach a volume associated with the default protocol controller to any other protocol controller.

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