Each SANmp disk contains a database of the users and active mount status, and if these records get out of sync, incorrect reporting or trouble mounting volumes can result.
When a volume is gracefully ejected/unmounted, the SANmp database is updated with information about this volume to show that it is no longer mounted by the machine that unmounted it. Proper unmounting keeps the SANmp database in sync.
When a volume is force-ejected or otherwise unexpectedly unmounted, the information about this condition cannot make it to the SANmp database, resulting in a "dead usage" record. Improper unmounting causes the SANmp database records to become out of sync.
SANmp Admin has a “Cleanup Dead Usage Records” function in the Administrator drop-down menu. This function exists to properly clear records that cause the SANmp database to become out of sync. Highlight the affected disk(s) to select this option and remove the stale mount records.
Important note: If dead usage records are continually being created, it’s important to find out why it’s happening. In addition to the added inconvenience of needing to flush these records, force-ejecting volumes can be dangerous to their file systems.
To protect the file system, the workstation’s operating system will not eject volumes if it believes they're still in use. When ejecting fails on Mac machines even though everything appears to be closed, the culprit is often Spotlight. Users may not realize this, and just opt to force-eject the volume.
To prevent Spotlight from indexing the volumes, all SAN volumes should be mounted R/W and dragged into Spotlight's Privacy section in System Preferences. This should only need to be done one time, on the newest version of macOS in the environment.