[Shield Android TV Q&A, Help & Troubleshooting] bobzer:
so i removed the sshd and try to backup it...

that's first that i wasn't able to recover anything from a drive that's appear on my computer :(

it's so strange because it's there the smart see it but i can't read nothing at all :

root@debian8:/mnt/raid/backup/shield# ls -l /dev/sdb
brw-rw---- 1 root disk 8, 16 juin 14 02:56 /dev/sdb
root@debian8:/mnt/raid/backup/shield# fdisk -l /dev/sdb
fdisk: impossible d'ouvrir /dev/sdb: Aucun fichier ou dossier de ce type

root@debian8:/mnt/raid/backup/shield# ddrescue -f -n /dev/sdb shield.dd mapfile
GNU ddrescue 1.19
Press Ctrl-C to interrupt
rescued: 0 B, errsize: 0 B, current rate: 0 B/s
ipos: 0 B, errors: 0, average rate: 0 B/s
opos: 0 B, run time: 1 s, successful read: 1 s ago
Finished

commande : 'smartctl' -i -H -c '/dev/sdb'

smartctl 6.4 2014-10-07 r4002 [x86_64-linux-3.16.0-4-amd64] (local build)
Copyright (C) 2002-14, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family: Seagate Laptop SSHD
Device Model: ST500LM000-1EJ162
Serial Number: W764J2R0
LU WWN Device Id: 5 000c50 082dc3e28
Firmware Version: NV9D
Rotation Rate: 5400 rpm
Form Factor: 2.5 inches
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-2, ACS-3 T13/2161-D revision 3b
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 1.5 Gb/s)
Local Time is: Wed Jun 14 03:02:44 2017 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART Status not supported: Invalid status byte (0x00) [JMicron]
SMART overall-health self-assessment test result: PASSED
Warning: This result is based on an Attribute check.

General SMART Values:
Offline data collection status: (0x00)	Offline data collection activity
was never started.
Auto Offline Data Collection: Disabled.
Self-test execution status: ( 0)	The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection:	( 139) seconds.
Offline data collection
capabilities:	(0x73) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
No Offline surface scan supported.
Self-test supported.
Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities: (0x0003)	Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01)	Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time:	( 1) minutes.
Extended self-test routine
recommended polling time:	( 99) minutes.
Conveyance self-test routine
recommended polling time:	( 2) minutes.
SCT capabilities:	(0x10b1)	SCT Status supported.
SCT Feature Control supported.
SCT Data Table supported.

here the dmesg :

[270724.389743] usb-storage 3-2:1.0: USB Mass Storage device detected
[270724.389819] scsi6 : usb-storage 3-2:1.0
[270724.389901] usbcore: registered new interface driver usb-storage
[270727.372913] scsi 6:0:0:0: Direct-Access ST500LM0 00-1EJ162 PQ: 0 ANSI: 2 CCS
[270727.373406] sd 6:0:0:0: Attached scsi generic sg2 type 0
[270730.079345] sd 6:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
[270730.079514] sd 6:0:0:0: [sdb] 72057594037927936 512-byte logical blocks: (0 B/0 B)
[270730.079798] sd 6:0:0:0: [sdb] Write Protect is off
[270730.079802] sd 6:0:0:0: [sdb] Mode Sense: 28 00 00 00
[270730.080127] sd 6:0:0:0: [sdb] No Caching mode page found
[270730.080137] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[270730.080827] sd 6:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
[270730.081756] sdb: unknown partition table
[270730.082349] sd 6:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
[270730.083081] sd 6:0:0:0: [sdb] Attached SCSI disk
[270736.012772] usb 3-2: USB disconnect, device number 5

someone ? do you have any idea ? what could i do ?