mounting external hard drive EXT4: "the unlocked device does not have a reckognizable filesystem on it"?

Posted by user824924 on Ask Ubuntu See other posts from Ask Ubuntu or by user824924
Published on 2013-11-12T20:34:50Z Indexed on 2013/11/12 22:03 UTC
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mount

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hard-drive

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ext4

I'm having problems mounting ext4 partitions(inside a LUKS partition) in external drives. The drives are fine, there is no problem whatsoever with the drives and no filesystem corruption.

This happened since a recent automatic system upgrade, and a manual upgrade to kernel 3.12.0.

It goes like this:

I plug in the external drive
Passphrase is asked for luks device
luks partition correctly unlocked/opened
Instead of proceding with mounting the now exposed ext4 partition there's a pop-up saying: "the unlocked device does not have a recognizable filesystem on it".

Same happens in this case:

$ gvfs-mount -d /dev/sdc2

Enter a passphrase to unlock the volume

The passphrase is needed to access encrypted data on WDC WD250... (250 GB > Hard Disk).

Password:

Error mounting /dev/sdc2: The unlocked device does not have a recognizable file system on it

Doing a manual sudo mount /dev/dm-1 /mnt/testfolder works with no errors and there is no problem with the filesystem (fscked). Also there doesn’t seem to be anything useful written to dmesg when this happens.

What gives?

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