6027-499 [X] An unexpected Device Mapper path dmDevice (nsdId) has been detected. The new path does not have a Persistent Reserve set up. File system fileSystem will be internally unmounted.
Explanation
A new device mapper path is detected or a previously
failed path is activated after the local device discovery has finished.
This path lacks a Persistent Reserve, and can not be used. All device
paths must be active at mount time.
User response
Check the paths to all disks making up the file system.
Repair any paths to disks which have failed. Remount the file system.