mount: special device UUID=xxxx does not exist

Thu, 04/15/2010 - 10:03 - augustin
Project:Linux hardware
Component:Documentation
Category:support request
Priority:normal
Assigned:Unassigned
Status:active
Project wiki:Hardware
Related pages:#29: filesystem
Description

mount: special device UUID=xxxx does not exist

even though the external disk is properly plugged...
How do I find the UUID of an unmounted device?

Comments

#1

augustin - 04/15/2010 - 10:19
Related pages:+29: filesystem

#2

augustin - 04/15/2010 - 10:26

root@Augustin:/mnt# mount /dev/sdc -t ext4 /mnt/disk
mount: wrong fs type, bad option, bad superblock on /dev/sdc,
       missing codepage or helper program, or other error
       (could this be the IDE device where you in fact use
       ide-scsi so that sr0 or sda or so is needed?)
       In some cases useful info is found in syslog - try
       dmesg | tail  or so
root@Augustin:/mnt# dmesg | tail
[12433.283108] usb-storage: device found at 2
[12433.283110] usb-storage: waiting for device to settle before scanning
[12433.283119] usbcore: registered new interface driver usb-storage
[12433.283122] USB Mass Storage support registered.
[12438.280318] usb-storage: device scan complete
[12438.281117] scsi 6:0:0:0: Direct-Access                                    PQ: 0 ANSI: 2 CCS
[12438.282369] sd 6:0:0:0: Attached scsi generic sg3 type 0
[12438.285834] sd 6:0:0:0: [sdc] Attached SCSI disk
[14975.628102] EXT3-fs: unable to read superblock
[15045.425608] EXT4-fs (sdc): unable to read superblock
root@Augustin:/mnt# mount /dev/sdc -t ext3 /mnt/disk
mount: wrong fs type, bad option, bad superblock on /dev/sdc,
       missing codepage or helper program, or other error
       (could this be the IDE device where you in fact use
       ide-scsi so that sr0 or sda or so is needed?)
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

root@Augustin:/mnt# dmesg | tail
[12433.283110] usb-storage: waiting for device to settle before scanning
[12433.283119] usbcore: registered new interface driver usb-storage
[12433.283122] USB Mass Storage support registered.
[12438.280318] usb-storage: device scan complete
[12438.281117] scsi 6:0:0:0: Direct-Access                                    PQ: 0 ANSI: 2 CCS
[12438.282369] sd 6:0:0:0: Attached scsi generic sg3 type 0
[12438.285834] sd 6:0:0:0: [sdc] Attached SCSI disk
[14975.628102] EXT3-fs: unable to read superblock
[15045.425608] EXT4-fs (sdc): unable to read superblock
[15086.866999] EXT3-fs: unable to read superblock

#3

augustin - 04/15/2010 - 10:44

Oh!
Apparently the device was not properly plugged. I unplugged and replugged it and it worked.
I had this problem before, as well.
-> document this in a troubleshooting section.

#4

augustin - 04/15/2010 - 10:48

Well, there is more to it.
I unmounted and tried to re-mount it straight away but I faced the same problem as above! :(

#5

augustin - 04/15/2010 - 11:09

my fstab entry was not properly configured.