Export/Disconnect Pool Error

[Berkyjay]

I'm trying to remove a pool so I can remake a new pool with the drives. But every time I run the export/disconnect command I get the following error:

Apr 18 10:34:02 freenas uwsgi: [middleware.exceptions:36] [MiddlewareError: Failed to remove mountpoint /mnt/Backup: [Errno 16] Device busy: '/mnt/Backup']

I'm running version FreeNAS-11.2-U8

 

[Berkyjay]

Hi is there anyone able to help me with this? I am still unable to disconnect my pool and I am out of ideas.

 

[sretalla]

You could either figure out which service is using that mount and stop it (probably one of the sharing protocols, so you could just stop SMB/NFS/AFP services, for example), or you could force the unmount with zfs unmount -f /mnt/Backup before trying to detach the pool.

 

[Berkyjay]

You could either figure out which service is using that mount and stop it (probably one of the sharing protocols, so you could just stop SMB/NFS/AFP services, for example), or you could force the unmount with zfs unmount -f /mnt/Backup before trying to detach the pool.

I turned off my SMB service (the only one running) and I tried the unmount command you provided. I'm still getting the /mnt/Backup: [Errno 16] Device busy .

Someone on a Reddit thread I made gave me this command to try: fstat | grep /mnt/Backup to see what processes were running on it. But it returns nothing. I can't think of a damn thing that would be holding up this pool. Is there no way to brute force it to unmount? There is no data on that pool to save FWIW.

 

[Berkyjay]

OK I ran zpool clear Backup. Once I did that I noticed that a mount point for this pool was showing up in a Plex jail. Not sure how that happened. But once I removed the mount point I was able to disconnect the pool.