A single LUN among from a group disappeared following the ESXI host restart. Neither the host nor the Vcenter can see it. I have four virtual machines on the LUN hiden now showing just unknown from VCenter.
Although strange I see the LUN available from the list you get when you try to ADD datastore from configuration ==> storage ==> Add Datastore.
I really need to mount the lun without formating since i have those four servers on it.
As an alternative being able to copy the files will do.