Unmount datastore fails - poweron file

[andvm]

I get datastore in use when trying to unmount and nothing seems to use it except I see ....poweron file time stamp updating.

This is the only host left to unmount this datastore and same host is in MM mode

any suggestions please?

[Nawals]

Please check is there any file which are in used. If yes please delete an make empty. Also, Check  Storage I/O Control enable on datastore. If enable please disable then you can try to unmount it.

[vFouad · Accepted solution]

Assuming you have VC;

Check that the datastore isn't being used for heartbeating Configure Heartbeat Datastores

If that is not the case... check for open files on the datastore:

from the CLI run a

'lsof | grep <datastore name>'

'lsof | grep <datastore uuid>'

if you don't know the datastore uuid run:

'ls -l /vmfs/volumes/ | grep "<datastore name>"

I hope this helps!