À l'avenir, merci de séparer les retours de commandes, comme je le fais ci-dessous :
zeilloc@zeilloc-desktop:~$ dmesg | tail -n 30
[ 121.692895] usb 1-1.5: SerialNumber: 058F312D81B
[ 121.747909] usb-storage 1-1.5:1.0: USB Mass Storage device detected
[ 121.751235] scsi6 : usb-storage 1-1.5:1.0
[ 121.751305] usbcore: registered new interface driver usb-storage
[ 122.751239] scsi 6:0:0:0: Direct-Access Generic USB SD Reader 1.00 PQ: 0 ANSI: 0
[ 122.751859] scsi 6:0:0:1: Direct-Access Generic USB CF Reader 1.01 PQ: 0 ANSI: 0
[ 122.752334] scsi 6:0:0:2: Direct-Access Generic USB SM Reader 1.02 PQ: 0 ANSI: 0
[ 122.752832] scsi 6:0:0:3: Direct-Access Generic USB MS Reader 1.03 PQ: 0 ANSI: 0
[ 122.753060] sd 6:0:0:0: Attached scsi generic sg2 type 0
[ 122.753192] sd 6:0:0:1: Attached scsi generic sg3 type 0
[ 122.753276] sd 6:0:0:2: Attached scsi generic sg4 type 0
[ 122.753353] sd 6:0:0:3: Attached scsi generic sg5 type 0
[ 123.216074] sd 6:0:0:0: [sdb] 31116288 512-byte logical blocks: (15.9 GB/14.8 GiB)
[ 123.219218] sd 6:0:0:0: [sdb] Write Protect is off
[ 123.219220] sd 6:0:0:0: [sdb] Mode Sense: 03 00 00 00
[ 123.222326] sd 6:0:0:0: [sdb] No Caching mode page found
[ 123.222330] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 123.225212] sd 6:0:0:1: [sdc] Attached SCSI removable disk
[ 123.226561] sd 6:0:0:3: [sde] Attached SCSI removable disk
[ 123.228688] sd 6:0:0:2: [sdd] Attached SCSI removable disk
[ 123.234948] sd 6:0:0:0: [sdb] No Caching mode page found
[ 123.234952] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 123.238191] sdb: sdb1 sdb2
[ 123.251828] sd 6:0:0:0: [sdb] No Caching mode page found
[ 123.251831] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 123.251834] sd 6:0:0:0: [sdb] Attached SCSI removable disk
[ 124.114895] FAT-fs (sdb1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[ 124.174088] EXT4-fs (sdb2): recovery complete
[ 124.175433] EXT4-fs (sdb2): mounted filesystem with ordered data mode. Opts: (null)
[ 124.938820] systemd-hostnamed[3198]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname!
zeilloc@zeilloc-desktop:~$
Tu remarqueras cette ligne :
[ 124.114895] FAT-fs (sdb1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck
Normalement, il faudrait réparer le FS (système de fichiers). Mais comme tu souhaites reformater, nous n'en avons pas besoin.
zeilloc@zeilloc-desktop:~$ lsusb
Bus 002 Device 004: ID 04fc:05d8 Sunplus Technology Co., Ltd Wireless keyboard/mouse
Bus 002 Device 003: ID 0cf3:9271 Atheros Communications, Inc. AR9271 802.11n
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 058f:6362 Alcor Micro Corp. Flash Card Reader/Writer
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
zeilloc@zeilloc-desktop:~$
zeilloc@zeilloc-desktop:~$ mount
/dev/sda5 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/cgroup type tmpfs (rw)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755)
none on /sys/fs/pstore type pstore (rw)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
systemd on /sys/fs/cgroup/systemd type cgroup (rw,noexec,nosuid,nodev,none,name=systemd)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,user=zeilloc)
/dev/sdb1 on /media/zeilloc/E0DD-55C5 type vfat (rw,nosuid,nodev,uid=1000,gid=1000,shortname=mixed,dmask=0077,utf8=1,showexec,flush,uhelper=udisks2)
/dev/sdb2 on /media/zeilloc/41cd6674-f3ee-4548-b23e-24adfe30ee01 type ext4 (rw,nosuid,nodev,uhelper=udisks2)
Aux 2 dernières lignes, on voit que les 2 partitions de ta carte sont montées, et montées en lecture-écriture, "rw".
Inscrit depuis 2008, tu sais que l'ext4 est un FS journalisé. Et tu sais que la mémoire flash n'est pas éternelle...
On commence par vérifier par un ultime "mount" que la lettre assignée à ta carte est toujours "b".
Puis on démonte :
sudo umount /dev/sdb1
sudo umount /dev/sdb2
Si tu as un message d'erreur, ne va pas plus loin et colle-le ici in extenso.
Si le démontage se passe sans histoire ET si la lettre est bien "b", tu remplis les 2 premiers Mo de ta carte de zéros :
sudo dd if=/dev/zero of=/dev/sdb bs=512 count=4096
Puis
1) donne le retour ;
2) débranche et rebranche ta carte, et redonne
dmesg | tail -n 22
mount
