fabrice@fabrius-desktop:~$ sudo mkdir /media/test puis fabrice@fabrius-desktop:~$ sudo mount /dev/sdb3 /media/test -o ro donnent

mount : mauvais type de système de fichiers, option erronée, superbloc
        erroné sur /dev/sdb3, page de code ou aide manquante, ou autre erreur
       Dans quelques cas certaines informations sont utiles dans syslog - essayez
       dmesg | tail  ou quelque chose du genre

fabrice@fabrius-desktop:~$ dmesg | tail donne

[618462.647303] sd 10:0:0:0: [sdb]  
[618462.647304] Sense Key : Medium Error [current] 
[618462.647308] sd 10:0:0:0: [sdb]  
[618462.647311] Add. Sense: Unrecovered read error
[618462.647313] sd 10:0:0:0: [sdb] CDB: 
[618462.647315] Read(10): 28 00 04 72 c3 fd 00 00 08 00
[618462.647323] end_request: critical target error, dev sdb, sector 74630141
[618462.647361] EXT3-fs error (device sdb3): ext3_get_inode_loc: unable to read inode block - inode=8, block=1027
[618462.647371] EXT3-fs (sdb3): error: no journal found
[619762.992404] nouveau E[   PFIFO][0000:01:00.0] DMA_PUSHER - Ch 2 Get 0x00200233f4 Put 0x0020024bb8 IbGet 0x00000295 IbPut 0x00000296 State 0x80000000 (err: INVALID_CMD) Push 0x00400040

fabrice@fabrius-desktop:~$ udisks --show-info /dev/sdb3 donne

Showing information for /org/freedesktop/UDisks/devices/sdb3
  native-path:                 /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.0/host10/target10:0:0/10:0:0:0/block/sdb/sdb3
  device:                      8:19
  device-file:                 /dev/sdb3
    presentation:              /dev/sdb3
    by-id:                     /dev/disk/by-id/usb-StoreJet_Transcend_90D952761FFF-0:0-part3
    by-id:                     /dev/disk/by-uuid/a3130b60-6c3a-4a91-bab1-0672506655b4
    by-path:                   /dev/disk/by-path/pci-0000:00:1a.0-usb-0:1.3:1.0-scsi-0:0:0:0-part3
  detected at:                 sam 15 fév 2014 21:05:43 CET
  system internal:             0
  removable:                   0
  has media:                   1 (detected at sam 15 fév 2014 21:05:43 CET)
    detects change:            0
    detection by polling:      0
    detection inhibitable:     0
    detection inhibited:       0
  is read only:                0
  is mounted:                  0
  mount paths:             
  mounted by uid:              0
  presentation hide:           0
  presentation nopolicy:       0
  presentation name:           
  presentation icon:           
  automount hint:              
  size:                        461898823680
  block size:                  512
  job underway:                no
  usage:                       filesystem
  type:                        ext3
  version:                     1.0
  uuid:                        a3130b60-6c3a-4a91-bab1-0672506655b4
  label:                       
  partition:
    part of:                   /org/freedesktop/UDisks/devices/sdb
    scheme:                    mbr
    number:                    3
    type:                      0x83
    flags:                    
    offset:                    38206425600
    alignment offset:          0
    size:                      461898823680
    label:                     
    uuid:                      

De grâce, si vous savez m'aider, dite le moi ! Je veux même bien me déplacer si c'est plus facile pour vous !
Merci d'avance de votre aide !

Édit du 16/02/2014 :
J'ai poster mon problème sur le forum d'Ubuntu-fr : http://forum.ubuntu-fr.org/viewtopic.php?pid=16065391#p16065391