If your trying to add an existing data store and its not showing up means two situations.,
1. Its getting detected as a snapshot LUN, To resolve this
when you re-scan the storage adapters does the device show with correct size if so check this KB : VMware KB: vSphere handling of LUNs detected as snapshot LUNs
2, its not presented correctly to the host.
I tried following the steps in the KB link you provided, it does not apply in my case as the LUN's presented to me do not have VMFS Label when i try to add storage and the resolution steps indicate that i should add only LUN's with a vmfs label
Should i not get an error of some kind if the storage is not presented correctly to the host, if i do get some error then i can probably try to follow the steps to resolve those errors
the other hosts see the storage exactly the same way as this host to which i'm adding the storage sees them. Just that when i try to add the LUN i get the error about the disk getting formatted
if nothing works, then i will have to move all the vm's off to another datastore and reformat this datastore to add it. Long and tedious procedure!
Any information from vmkernel logs, for this particular lun....
I have seen situations where it have lost partition information only specific Hosts.
Alright then, could you run this command and see if there an output.?
partedUtil getptbl "/vmfs/devices/disks/DeviceName
yup this is the o/p i got
~ # partedUtil getptbl "/vmfs/devices/disks/naa.6d4ae5200075ccb50000061950221ef7"
254853 255 63 4094217420
1 2048 4094216191 AA31E02A400F11DB9590000C2911D1B8 vmfs 0
is there any specific log entry that i should be looking for, there are a ton of logs
i did do a search for the specific LUN identifier (naa.6d4ae5200075ccb50000061950221ef7) in question in the logs and found these entries
QErr is correctly set to 0x0 for device naa.6d4ae5200075ccb50000061950221ef7
Could not detect setting of sitpua for device naa.6d4ae5200075ccb50000061950221ef7. Error failure
Successfully registered device "naa.6d4ae5200075ccb50000061950221ef7" from plugin "NMP" of type 0
any suggestions ?
issue resolved now
rebooted the host with the issue (although had rebooted it earlier with no resolution) and it seems to see the datastores now without me configuring anything. Very weird, learnt nothing about the issue. Very disappointed!!
i got the solution.. :-)
The volume we trying to attach is a NTFS partition.
Remove Hard drive from your server and attach externally your laptop and delete the volume that create in this hard, Now you can add feel free this hard on your ESXI storage.