Cannot unmount or Delete Datastore LUNS

[Tusharp99]

Hi,

I am in a situations where I need some help. I have ESXI 5 running Vsphere 5 with 10 Blades and two clusters, running about 100 + VM's.

I have shutdown/decommissioned some VM's and want to release the SAN space back to be used somewhere else...

However when I try to Unmount or Delete the luns I get following message

Remove datastore XXXXXXXXXXX The vSphere HA agent on host 'XXXXXXXXXXX' failed to quiesce file activity on datastore  '/vmfs/volumes/5010-56cd-f941c-2e5-66db-78e7d1f974-2b'. To proceed with the operation to unmount or remove a datastore, ensure that the datastore is accessible, the host is reachable and its vSphere HA agent is running.

I have tried to couple of suggestions I found on the web, Right Click on the each cluster | Edit Settings | Click on Datastore Heartbeating | then selected Option " Select only from my preferred Datastores, Checked all the Datastores except the ones I am trying to unmount/delete.

Still no luck...

All the help will be greatly appreciated..

Thanks

[ScreamingSilenc]

Found these two links stating your problem hope it might be helpful

KB: VMware KB: vSphere HA and FT Error Messages

Unmounting datastore fails due to vSphere HA?

[kiranchavan30]

Please check if still any VM is utilizing that datastore. Since you want to permanently remove the LUN from the ESXi hsots, then If nothing is running from that datastore then try to delete it directly by right clicking on LUN and select delete.

Rescan the datastore once you delete the LUN.

Regards,

KC

[ScreamingSilenc]

One more thing you can try is restarting your hostd and try deleting the LUN

[admin]

Login directly to one of the Host with Vsphere client. configuration -- storage -- Try un mounting it from here and it should work from us.

[Tusharp99]

Thanks will try some of the options

Couple of more thing, when I remove the VM, I log on through Vsphere clients,  I right click on the host and select the option Delete from Disk.

Should I be deleting the VM through web clients..

It used to work in older version of ESX file...

Is there a special process of deleting the VM and then releasing and deleting the Storage....with ESXi 5

[admin]

ESXi 5 does not have an delete option -- check if this helps.

VMware KB: Unmounting a LUN or detaching a datastore/storage device from multiple ESXi 5.x hosts