systém nevidí externí disk

[stapes]

Dobrý den, po poruše nahrávání na sat PVR Dreambox nemohu připojit externí disk. Co s tím?
 jarda@jarda-desktop:~/Plocha$ sudo lshw -C disk
  *-disk                 
       description: ATA Disk
       product: SAMSUNG HD502IJ
       physical id: 0
       bus info: scsi@0:0.0.0
       logical name: /dev/sda
       version: 1AA0
       serial: S1CTJ90QB05088
       size: 465GiB (500GB)
       capabilities: partitioned partitioned:dos
       configuration: ansiversion=5 signature=1549f232
  *-cdrom
       description: DVD-RAM writer
       product: DVD-RAM GH15L
       vendor: HL-DT-ST
       physical id: 1
       bus info: scsi@1:0.0.0
       logical name: /dev/cdrom
       logical name: /dev/cdrw
       logical name: /dev/dvd
       logical name: /dev/dvdrw
       logical name: /dev/scd0
       logical name: /dev/sr0
       version: FD5D
       capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
       configuration: ansiversion=5 status=nodisc
  *-disk
       description: SCSI Disk
       physical id: 0.0.0
       bus info: scsi@10:0.0.0
       logical name: /dev/sdb
       size: 465GiB (500GB)
       capabilities: partitioned partitioned:dos
       configuration: signature=910a63c3
  *-disk:0
       description: SCSI Disk
       physical id: 0.0.0
       bus info: scsi@7:0.0.0
       logical name: /dev/sdc
  *-disk:1
       description: SCSI Disk
       physical id: 0.0.1
       bus info: scsi@7:0.0.1
       logical name: /dev/sdd
  *-disk:2
       description: SCSI Disk
       physical id: 0.0.2
       bus info: scsi@7:0.0.2
       logical name: /dev/sde
  *-disk:3
       description: SCSI Disk
       physical id: 0.0.3
       bus info: scsi@7:0.0.3
       logical name: /dev/sdf
jarda@jarda-desktop:~/Plocha$ sudo fdisk /dev/sdc

/dev/sdc nelze otevřít
jarda@jarda-desktop:~/Plocha$ sudo lshw -C disk
  *-disk                 
       description: ATA Disk
       product: SAMSUNG HD502IJ
       physical id: 0
       bus info: scsi@0:0.0.0
       logical name: /dev/sda
       version: 1AA0
       serial: S1CTJ90QB05088
       size: 465GiB (500GB)
       capabilities: partitioned partitioned:dos
       configuration: ansiversion=5 signature=1549f232
  *-cdrom
       description: DVD-RAM writer
       product: DVD-RAM GH15L
       vendor: HL-DT-ST
       physical id: 1
       bus info: scsi@1:0.0.0
       logical name: /dev/cdrom
       logical name: /dev/cdrw
       logical name: /dev/dvd
       logical name: /dev/dvdrw
       logical name: /dev/scd0
       logical name: /dev/sr0
       version: FD5D
       capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
       configuration: ansiversion=5 status=nodisc
  *-disk
       description: SCSI Disk
       physical id: 0.0.0
       bus info: scsi@10:0.0.0
       logical name: /dev/sdb
       size: 465GiB (500GB)
       capabilities: partitioned partitioned:dos
       configuration: signature=910a63c3
  *-disk:0
       description: SCSI Disk
       physical id: 0.0.0
       bus info: scsi@7:0.0.0
       logical name: /dev/sdc
  *-disk:1
       description: SCSI Disk
       physical id: 0.0.1
       bus info: scsi@7:0.0.1
       logical name: /dev/sdd
  *-disk:2
       description: SCSI Disk
       physical id: 0.0.2
       bus info: scsi@7:0.0.2
       logical name: /dev/sde
  *-disk:3
       description: SCSI Disk
       physical id: 0.0.3
       bus info: scsi@7:0.0.3
       logical name: /dev/sdf
jarda@jarda-desktop:~/Plocha$ sudo fdisk /dev/sdc

/dev/sdc nelze otevřít