You rescan your HBAs on the ESX and your new LUN suddenly appears. But when you want to add it as new datastore you get “Unable to Read Partition Information” . The same error happens on every ESX you try.
Ok, you have to know that only MS-DOS partitioned disks are recongnized by ESX. I had to face this issue once Storage team gave me the disk. It was re-assigned from a previous AIX system. So , heres what you can do :
Firts: Ensure the LunID and path are correct because all data will be destroyed.
1. esxcfg-vmhbdevs -q | grep LUNID
This will show you the canonical path for your LUN and the devicename
Use the devicename from step 1 to invoke parted tool.
2. parted /dev/sdc (The path showed before)
A new prompt will appear waiting for commands
3. mklabel msdos
4. Quit and try to Add a new Datastore again.
Good Luck !