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Caution about using the VCMDB LUN

For the VCMDB (Volume Configuration Management Database) to be enabled, the VCMDB LUN must exist. The VCMDB LUN is a command type LUN, not a storage LUN. The VCMDB is typically mapped to LUN 0, but can be mapped to an array LUN other than LUN 0.

If the VCMDB LUN is mapped to a V-Series system, Data ONTAP periodically logs a message that the VCMDB LUN is less than the minimum size required, and it marks the VCMDB LUN as failed. The V-Series system continues to function normally after logging this error message, but it cannot use the LUN.

A VCMDB LUN should be unmapped from a V-Series system.