I've got a 2TB Toshiba USB drive which I have been using for my Time Machine backups. Since a few days this disk no longer shows up when I connect it. Already tried completely shutting everything down and rebooting, no difference.
When running Disk Utility, it's not there.
diskutil list, it's not there.
I can't mount it (there's no volume or anything to mount).
I tried both USB ports, with the same cable I always use (it has always worked fine on both USB ports before).
When looking in System Information, either in the Store or USB section, it's not there.
I checked if
fsckmight be running while it's seemingly busy, but that's not the case. I also checked if VirtualBox was trying to filter the USB drive, also not the case (actually, VirtualBox is not running at all).
(I found these two suggestions in a similar question)
It's not an NTFS drive.
However, when I reboot into Recovery Mode and look in the Disk Utility there, it does show up!
Also, when I connect the USB drive in OS X, it starts buzzing and spinning i.e. making the usual sounds as if it's working normally. Goes on like that for about half a minute and then stops.
Any advice? I'm convinced that 'something' was changed to my system configuration that's causing the drive not to show up, but I can't seem to find out what.
Would it be wise or safe to start in Recovery Mode again, and do a First Aid / Disk Repair from there? (I would really prefer if the data on this drive doesn't get messed up)