Hi Chris,

I would be
more inclined to to think about a electrical problem, since the only rep-plugging of the connectors of the HD solves the problem ..
In any case I think the
control of the HD  is appropriate, so I would ask you in detail how to do this operation:

This is what I get with the command blkid (the output concern only the partition where is the OS Fedora):

/dev/sdc1: UUID="4b1e5e09-306b-4c17-8c2f-653b32e1b956" TYPE="ext4" PARTUUID="0008635c-01"
/dev/sdc2: UUID="Vtbdeq-eq6H-sbMY-Mpme-UyFk-jx77-I5Z20K" TYPE="LVM2_member" PARTUUID="0008635c-02"
/dev/mapper/fedora-root: UUID="2d224b16-d37f-4eee-820a-dfcd5929e05e" TYPE="ext4"
/dev/mapper/fedora-swap: UUID="54d55595-8c35-4e84-8566-89d8b6f340e8" TYPE="swap"


so I should do :
e2fsck -f /dev/sdc1
and after
e2fsck -f /dev/sdc2

This is enough ?

After I did I'll ask you more..

I am sorry about the message... I would include a photo of the output but the administrator of the mail list didn't do it because the message had a size too much big..

thank you
Angelo