There are many threads about getting stuck during array with an error "retry unmounting share".  The suggested typically is to go force unmount things or disconnect network shares.

That's inconvenient but workable in most situations, and I've run into it myself several times.

 

However, I've just had an incident where the power went out, and the UPS triggered shutdown.  The shutdown never completed because of this issue.  Luckily the power came back up before the UPS died.  Side note, the shutdown did eventually finish.

 

I'll still leave UPS shutdown enabled because a chance is better than nothing, but without any ability to force the array to shutdown its reliability is limited.

 

Is there no way to force clients offline, or otherwise force the array to shutdown in necessary situations like this?

You must fix the retrying unmount share issue, does it happen with every shutdown?

It may not be all, but it is most shutdowns. It seems to be an issue with samba mounts.  I have a few windows systems that map shares as network drives.  If I remote into those systems and dismount all shares, that seems to fix it.

I don't see any open files when I check with smb tools on unraid though.

 

Just having mapped shares should not be a problem, there could be something with an open file.

I can't control the clients though, they may be using files during a power down event.  Can SMB not be forced to shutdown?

10 minutes ago, carlel said:

I can't control the clients though, they may be using files during a power down event.  Can SMB not be forced to shutdown?

You can install apcupsd on the clients and have them set to shutdown immediately on power loss to give your server time to gracefully shut down

2 minutes ago, Michael_P said:

You can install apcupsd on the clients and have them set to shutdown immediately on power loss to give your server time to gracefully shut down

Awesome I will look into this thanks!