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I'm writing this thread because i haven't found any solution yet. The problem is that after formatting my USB stick 2 days ago(sudo mkfs.ntfs /dev/sdb1) from FAT to NTFS to get rid of 4 GB file limit.It's a 32 GB USB stick from Toshiba. Everything seemed to be okay until the reboot. Since then i can't access it because it doesn't react to plug.I tried various things but still the same.On windows 10 however i can see F drive but can't access it either.

Output of some commands:

lsusb  
Bus 001 Device 011: ID 0c76:0005 JMTek, LLC. Transcend Flash disk
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 09da:000a A4Tech Co., Ltd. Optical Mouse Opto 510D / OP-620D
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub 
dmesg | tail -n10

[11631.572258] [UFW AUDIT] IN=eth0 OUT= MAC=00:25:22:8c:c7:a0:08:10:78:23:75:aa:08:00 SRC=151.101.1.69 DST=192.168.1.3 LEN=1496 TOS=0x08 PREC=0x00 TTL=47 ID=20787 DF PROTO=TCP SPT=443 DPT=48938 WINDOW=300 RES=0x00 ACK URGP=0 
[11631.572303] [UFW AUDIT] IN= OUT=eth0 SRC=192.168.1.3 DST=151.101.1.69 LEN=52 TOS=0x00 PREC=0x00 TTL=64 ID=55410 DF PROTO=TCP SPT=48938 DPT=443 WINDOW=1444 RES=0x00 ACK URGP=0 
[11631.572480] [UFW AUDIT] IN=eth0 OUT= MAC=00:25:22:8c:c7:a0:08:10:78:23:75:aa:08:00 SRC=151.101.1.69 DST=192.168.1.3 LEN=1396 TOS=0x08 PREC=0x00 TTL=47 ID=20788 DF PROTO=TCP SPT=443 DPT=48938 WINDOW=300 RES=0x00 ACK PSH URGP=0 
[11631.572499] [UFW AUDIT] IN= OUT=eth0 SRC=192.168.1.3 DST=151.101.1.69 LEN=52 TOS=0x00 PREC=0x00 TTL=64 ID=55411 DF PROTO=TCP SPT=48938 DPT=443 WINDOW=1444 RES=0x00 ACK URGP=0 
[11631.572719] [UFW AUDIT] IN=eth0 OUT= MAC=00:25:22:8c:c7:a0:08:10:78:23:75:aa:08:00 SRC=151.101.1.69 DST=192.168.1.3 LEN=1496 TOS=0x08 PREC=0x00 TTL=47 ID=20789 DF PROTO=TCP SPT=443 DPT=48938 WINDOW=300 RES=0x00 ACK URGP=0 
[11631.572737] [UFW AUDIT] IN= OUT=eth0 SRC=192.168.1.3 DST=151.101.1.69 LEN=52 TOS=0x00 PREC=0x00 TTL=64 ID=55412 DF PROTO=TCP SPT=48938 DPT=443 WINDOW=1444 RES=0x00 ACK URGP=0 
[11631.573826] [UFW AUDIT] IN=eth0 OUT= MAC=00:25:22:8c:c7:a0:08:10:78:23:75:aa:08:00 SRC=151.101.1.69 DST=192.168.1.3 LEN=1286 TOS=0x08 PREC=0x00 TTL=47 ID=20790 DF PROTO=TCP SPT=443 DPT=48938 WINDOW=300 RES=0x00 ACK PSH URGP=0 
[11631.573851] [UFW AUDIT] IN= OUT=eth0 SRC=192.168.1.3 DST=151.101.1.69 LEN=52 TOS=0x00 PREC=0x00 TTL=64 ID=55413 DF PROTO=TCP SPT=48938 DPT=443 WINDOW=1444 RES=0x00 ACK URGP=0 
[11631.765579] [UFW AUDIT] IN=eth0 OUT= MAC=00:25:22:8c:c7:a0:08:10:78:23:75:aa:08:00 SRC=151.101.1.69 DST=192.168.1.3 LEN=564 TOS=0x08 PREC=0x00 TTL=47 ID=2825 DF PROTO=TCP SPT=443 DPT=48937 WINDOW=237 RES=0x00 ACK PSH URGP=0 
[11631.765610] [UFW AUDIT] IN= OUT=eth0 SRC=192.168.1.3 DST=151.101.1.69 LEN=52 TOS=0x00 PREC=0x00 TTL=64 ID=5726 DF PROTO=TCP SPT=48937 DPT=443 WINDOW=1444 RES=0x00 ACK URGP=0 
cat /etc/mtab  
/dev/sda5 / ext4 rw,errors=remount-ro 0 0
proc /proc proc rw,noexec,nosuid,nodev 0 0
sysfs /sys sysfs rw,noexec,nosuid,nodev 0 0
none /sys/fs/cgroup tmpfs rw 0 0
none /sys/fs/fuse/connections fusectl rw 0 0
none /sys/kernel/debug debugfs rw 0 0
none /sys/kernel/security securityfs rw 0 0
udev /dev devtmpfs rw,mode=0755 0 0
devpts /dev/pts devpts rw,noexec,nosuid,gid=5,mode=0620 0 0
tmpfs /run tmpfs rw,noexec,nosuid,size=10%,mode=0755 0 0
none /run/lock tmpfs rw,noexec,nosuid,nodev,size=5242880 0 0
none /run/shm tmpfs rw,nosuid,nodev 0 0
none /run/user tmpfs rw,noexec,nosuid,nodev,size=104857600,mode=0755 0 0
none /sys/fs/pstore pstore rw 0 0
selinuxfs /sys/fs/selinux selinuxfs rw,relatime 0 0
overflow /tmp tmpfs rw,size=1048576,mode=1777 0 0
/dev/sda7 /home ext4 rw 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,noexec,nosuid,nodev 0 0
systemd /sys/fs/cgroup/systemd cgroup rw,noexec,nosuid,nodev,none,name=systemd 0 0
/home/boss/.Private /home/boss ecryptfs ecryptfs_check_dev_ruid,ecryptfs_cipher=aes,ecryptfs_key_bytes=16,ecryptfs_unlink_sigs,ecryptfs_sig=19ba0418664290d3,ecryptfs_fnek_sig=5cd3a2573947e2d1 0 0
gvfsd-fuse /run/user/1000/gvfs fuse.gvfsd-fuse rw,nosuid,nodev,user=boss 0 0
ls /dev/ | grep sd  
sda
sda1
sda2
sda3
sda4
sda5
sda6
sda7
sdb
tail -f /var/log/messages  
tail: cannot open ‘/var/log/messages’ for reading: No such file or directory
lsmod | grep usb  
usb_storage            62209  0 
usbhid                 52659  0 
hid                   106148  3 hid_a4tech,hid_generic,usbhid
df -h  
Filesystem           Size  Used Avail Use% Mounted on
udev                 2.0G   12K  2.0G   1% /dev
tmpfs                396M  1.3M  394M   1% /run
/dev/sda5             28G   20G  6.5G  76% /
none                 4.0K     0  4.0K   0% /sys/fs/cgroup
none                 5.0M     0  5.0M   0% /run/lock
none                 2.0G   62M  1.9G   4% /run/shm
none                 100M   36K  100M   1% /run/user
overflow             1.0M   16K 1008K   2% /tmp
/dev/sda7            613G  185G  397G  32% /home
/home/boss/.Private  613G  185G  397G  32% /home/boss
sudo fdisk -l  
Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
135 heads, 14 sectors/track, 1033611 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0xf7bd90fe

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      206847      102400    7  HPFS/NTFS/exFAT
/dev/sda2          206848   585222747   292507950    7  HPFS/NTFS/exFAT
/dev/sda3       585224192   586143743      459776   27  Hidden NTFS WinRE
/dev/sda4       586145790  1953523711   683688961    5  Extended
Partition 4 does not start on physical sector boundary.
/dev/sda5       586145792   644739071    29296640   83  Linux
/dev/sda6       644741120   648644607     1951744   82  Linux swap / Solaris
/dev/sda7       648646656  1953523711   652438528   83  Linux
lsblk  
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0 931.5G  0 disk 
├─sda1   8:1    0   100M  0 part 
├─sda2   8:2    0   279G  0 part 
├─sda3   8:3    0   449M  0 part 
├─sda4   8:4    0     1K  0 part 
├─sda5   8:5    0    28G  0 part /
├─sda6   8:6    0   1.9G  0 part 
└─sda7   8:7    0 622.2G  0 part /home
sr0     11:0    1  1024M  0 rom  

I'm sorry for that spam but i couldn't find spoiler option. I need some help from you ASAP. It's weird that fdisk and df can't see it.It's quite tough problem for me.

I look forward to hearing from you,

SuperDude

edit1 :

after that 'sudo ntfsfix -b /dev/sdb' i got

'Mounting volume... Error opening '/dev/sdb': No medium found
FAILED
Attempting to correct errors... Error opening '/dev/sdb': No medium found
FAILED
Failed to startup volume: No medium found
Error opening '/dev/sdb': No medium found
Volume is corrupt. You should run chkdsk. '

and after sudo fsck /dev/sdb i got this :

'fsck from util-linux 2.20.1
e2fsck 1.42.9 (4-Feb-2014)
fsck.ext2: No medium found while trying to open /dev/sdb

The superblock could not be read or does not describe a valid ext2/ext3/ext4
filesystem.  If the device is valid and it really contains an ext2/ext3/ext4
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
    e2fsck -b 8193 
 or
    e2fsck -b 32768  '

tried that e2fsck but it changed nothing

fsck from util-linux 2.20.1
e2fsck 1.42.9 (4-Feb-2014)
fsck.ext2: No medium found while trying to open /dev/sdb

The superblock could not be read or does not describe a valid ext2/ext3/ext4
filesystem.  If the device is valid and it really contains an ext2/ext3/ext4
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
    e2fsck -b 8193 
 or
    e2fsck -b 32768  
  • Once I'd had similar problem, but don't remember what the cause (it seems was a windows bootable pendrive). I solved it with gparted: I'd deleted all partitions and applied the changes. Then I'd created a new single partition NTFS. I don't know xubuntu has gparted but I believe has something native similar software. – gwarah Jun 19 '16 at 12:57
  • About gparted i have it installed but it only sees my HDD partitions , nothing else. – SuperDude Jun 19 '16 at 13:01
  • Ok, @SuperDude. On gparted screen in device selector (up-rigth corner) Isn't there the pendrive device?? Could you try in other USB port? Or in other linux machine? – gwarah Jun 19 '16 at 13:11
  • I can choose only /dev/sda (931.51GB). I own other 16GB usb stick but it works fine. About the other ports i checked all and the same situation. I only have one PC right now so just xubuntu and win10 on dual boot. – SuperDude Jun 19 '16 at 13:17
  • Now I remember. I'd this problem because one partition was bootable and encrypted. Have you created any encrypted/bootable partition before? If has been the case, try to delete with the same program. These partition are visible only to these programs. – gwarah Jun 19 '16 at 13:30

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