USB HD (Ext4) does not auto-mount anymore

[Alan Cox]

On Fri, 7 Sep 2012 13:42:40 +0900
nomnex <nomnex at gmail.com> wrote:

> Fedora 15 XFCE (the file manager is Thunar). I use an external USB HD
> (formatted Ext4, same as my system) to backup my system. The drive
> auto-mounts when I turn the notebook on.
> 
> I violently pulled the USB cable by accident. Both the drive and the
> external HD were transferring data when it happened.
> 
> I turned off both devices, I checked the USB cable and the USB
> sockets. After re-booting, the external drive starts, but it does
> appears anymore in my file manager. I tried with a second portable USB
> HD (also formatted Ext4). The lead turns green, but it does not
> auto-mount either.
> 
> I tried with a USB stick (Fat32). I can see this drive in the file
> manager.
> 
> How do I troubleshoot that?

If you get a light it probably means you've got power, but not
necessarily any other signals.

Stuff the thing in, and see what is logged in dmesg when you do so