voici ce qu'il me renvoi, la fin n'est évidemment pas rassurante !
=== START OF INFORMATION SECTION ===
Model Family: Seagate Barracuda 7200.14 (AF)
Device Model: ST1000DM003-1CH162
Serial Number: S1D8EKQD
LU WWN Device Id: 5 000c50 05c12cd88
Firmware Version: CC46
User Capacity: 1 000 204 886 016 bytes [1,00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 7200 rpm
Form Factor: 3.5 inches
Device is: In smartctl database [for details use: -P show]
ATA Version is: ATA8-ACS T13/1699-D revision 4
SATA Version is: SATA 3.0, 6.0 Gb/s (current: 1.5 Gb/s)
Local Time is: Sat Oct 27 20:13:15 2018 EEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
Read SMART Data failed: scsi error medium or hardware error (serious)
=== START OF READ SMART DATA SECTION ===
SMART Status command failed: Connexion terminée par expiration du délai d'attente
SMART overall-health self-assessment test result: UNKNOWN!
SMART Status, Attributes and Thresholds cannot be read.
Read SMART Log Directory failed: scsi error medium or hardware error (serious)
Read SMART Error Log failed: scsi error medium or hardware error (serious)
Read SMART Self-test Log failed: scsi error medium or hardware error (serious)
Selective Self-tests/Logging not supported
Contrairement à ce que j'avais écrit plus haut, il n'est pas suffisant de redémarrer car tesdisk écrit un fichier log dans /root qui ne s'efface pas tout seul, il faisait 39Go !
Gérard