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One of the partitions on an external drive just went partway south on me. It shows up grayed out (unmounted) in Disk Utility as "disk3s5" but DU won't mount it. I ran the following:
localhost:~ tod$ diskutil mountDisk /dev/disk3s5
One or more volume(s) failed to mount
As you can see, however, the command failed. Interestingly, in the list output by diskutil list
, it shows up without a name.
I've used Disk Warrior and Drive Genius, and neither of them fixed the partition.
Any tips on how to get this dog to mount so I can move files elsewhere?
Anything in your
/etc/fstab
file? That caused this issue for me. – Xeoncross – 2014-09-06T16:50:04.210What file system you have got on this partition? – Chris – 2013-05-29T19:55:43.907
Might want to see if you can use TestDisk to browse the files or repair the filesystem...
– Breakthrough – 2013-05-29T20:07:57.750Sorry Folks, I totally forgot to add crucial details. I'm using a late 2012 Mac Mini running OS X 10.8.3. The file system is HFS. There are several other partitions on this 2TB drive and all of them mound and unmount fine. Can read/write to all of them. Doing a "Repair Disk" within Disk Utility returns such wonderful error messages as "Invalid B-tree node size" and "Error: Disk Utility can't repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files." Trouble is, I can't back them up until I've mounted it. :-( – Jack Daniels – 2013-05-29T21:17:24.827