Linux Disk wont mount

[Red Squirrel]

For some reason, a the HDD that I use to run my backups refuses to mount. I get this error:

mount: /dev/sde1 already mounted or /mnt/rembackupdisk/ busy

It is NOT in use and that folder is NOT busy. I even tried deleting the folder and recreating it, no go. I tried both mounting by label and by disk "letter". Why won't this thing mount? It worked fine before. If it matters, it is inserted in a removable disk dock.

 

[keenan]

There's an open filehandle on the filesystem somewhere. You can probably use lsof to find out what process has an open handle and kill it or close the file.

Or your system has automounted the filesystem to a different location, as most distros do these days.

 

[Red Squirrel]

lsof did not seem to have anything in that folder (did a grep as the list was super long - that looks like a handy command though!) I had did a mount -l to confirm it was not mounted elsewere and it was not.

I went to the server room, stopped the drive and started it again, and that seems to have done the trick. Guess I should of thought of that before.