Merci LeJediGris,
Voici le retour;
michel@michel-System-Product-Name:~$ dmesg | grep sd
[ 2.441026] sd 0:0:0:0: [sda] 468862128 512-byte logical blocks: (240 GB/224 GiB)
[ 2.441037] sd 0:0:0:0: [sda] Write Protect is off
[ 2.441038] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 2.441056] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 2.441298] sd 0:0:0:0: Attached scsi generic sg0 type 0
[ 2.441640] sda: sda1 sda2 sda3 < sda5 > sda4
[ 2.441965] sd 0:0:0:0: [sda] Attached SCSI disk
[ 2.484893] sd 2:0:0:0: Attached scsi generic sg2 type 0
[ 2.485116] sd 3:0:0:0: Attached scsi generic sg3 type 0
[ 2.485189] sd 3:0:0:0: [sdc] 1953525168 512-byte logical blocks: (1.00 TB/932 GiB)
[ 2.485190] sd 3:0:0:0: [sdc] 4096-byte physical blocks
[ 2.485199] sd 3:0:0:0: [sdc] Write Protect is off
[ 2.485201] sd 3:0:0:0: [sdc] Mode Sense: 00 3a 00 00
[ 2.485217] sd 3:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 2.485331] sd 2:0:0:0: [sdb] 117231408 512-byte logical blocks: (60.0 GB/55.9 GiB)
[ 2.485339] sd 2:0:0:0: [sdb] Write Protect is off
[ 2.485340] sd 2:0:0:0: [sdb] Mode Sense: 00 3a 00 00
[ 2.485384] sd 2:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 2.485789] sdb: sdb1 sdb2
[ 2.486030] sd 2:0:0:0: [sdb] Attached SCSI disk
[ 2.501447] sdc: sdc1 sdc2
[ 2.501847] sd 3:0:0:0: [sdc] Attached SCSI disk
[ 4.672747] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
[ 5.109319] sd 6:0:0:0: Attached scsi generic sg4 type 0
[ 5.109473] sd 6:0:0:1: Attached scsi generic sg5 type 0
[ 5.109611] sd 6:0:0:2: Attached scsi generic sg6 type 0
[ 5.109751] sd 6:0:0:3: Attached scsi generic sg7 type 0
[ 5.161301] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro
[ 5.200028] sd 6:0:0:0: [sdd] Attached SCSI removable disk
[ 5.211015] sd 6:0:0:1: [sde] Attached SCSI removable disk
[ 5.221015] sd 6:0:0:2: [sdf] Attached SCSI removable disk
[ 5.231145] sd 6:0:0:3: [sdg] Attached SCSI removable disk
[ 7.149567] EXT4-fs (sdc1): mounted filesystem with ordered data mode. Opts: (null)
michel@michel-System-Product-Name:~$