I'm trying to unmount an NFS share. When I try it in vsphere I get a message: Error during the configuration of the host: NFS nError: Unable to Unmount filesystem: Busy.
When I try in esx:
esxcfg-nas -d "share name"
Error performing operation: NFS Error: Unable to Unmount filesystem: Busy
This is what is in /var/log/vmkernel:
WARNING: NFS: 1668: share name has open files, cannot be unmounted
I have checked there are VMs with files on this share, no ISOs mounted on the VMs. There are no VMs showing in the VM tab in the datastore in vpshere. The map on this host shows that the host is connected to the share.
Unfortunately esx has no tools like fuser or lsof or a simple tool to find what's keeping the filesystem open and the server is an ancient one with not very many diagnostics I can understand.
How do I unmount this share?