How I can fix the Error mounting /dev/sdb1 at /media/... It works pretty good in the past but I made a clean installed of Ubuntu 14.04 LTS and the Error mounting coming. I try to fix it with with Gparted, ntfs-3g, pmount, but this programs can't find the external HDD. But when I boot put the USB drive with Ubuntu 14.04 on test mode this can find and read my external HDD. How I can fix it?

5 Answers 5


open terminal with Ctrl+Alt+T and run

sudo ntfsfix /dev/sdb1 
  • before I use this command, I want to make sure it doesn't put my files already on the drive in danger. My drive is loaded with files, and worked on windows system. Now that I connect it to ubuntu, it shows me the above error. If I use the above suggested command, will it make my files inaccessible ? I understand it will make the drive usable. By also care about existing files, written by Windows.
    – Elad Lavi
    Nov 17, 2017 at 9:54
  • I did this. But it gives this error ntfs_mst_post_read_fixup_warn: magic: 0x00000000 size: 1024 usa_ofs: 0 usa_count: 0: Invalid argument Record 10 has no FILE magic (0x0) Failed to open inode FILE_UpCase: Input/output error May 21, 2019 at 7:31
  • It works in 2022, too. Thank you.
    – GhitaB
    Mar 10 at 7:27
  • many thanx ace fix in 2022 on 20.04 on a caddy external which I thought might have been defunct ... all it needed was that line ...
    – shantiq
    Apr 19 at 7:40

Run this command to show disks:


Run this command to mount usb:

sudo ntfsfix /dev/sdb

/dev/sdb or /dev/sdb1 or some other path

  • sudo ntfsfix /dev/sdb it worked for me. Apr 30 at 11:46

It might be the case that the naming changes when you try the drive on different things. ( sdb becomes sdX because of how the usbs are enumerated) Open a terminal and play with:


If you are still unsure, then try

dmesg | more 

and read the system log, at one point you should see something similar to:

150289.144120] scsi 7:0:0:0: Direct-Access     WDC WD32 00BEKT-22KA9T0   01.0 PQ: 0 ANSI: 5
[150289.144951] sd 7:0:0:0: Attached scsi generic sg4 type 0
[150289.145185] sd 7:0:0:0: [sdd] 625142448 512-byte logical blocks: (320 GB/298 GiB)
[150289.145854] sd 7:0:0:0: [sdd] Write Protect is off
[150289.145863] sd 7:0:0:0: [sdd] Mode Sense: 23 00 00 00
[150289.146547] sd 7:0:0:0: [sdd] No Caching mode page found
[150289.146555] sd 7:0:0:0: [sdd] Assuming drive cache: write through
[150289.212988]  sdd: sdd4
[150289.215143] sd 7:0:0:0: [sdd] Attached SCSI disk

If not, then try different usb ports, some usb are full powered, some half powered, some mother board don't like usb3 devices on usb2 slots..

  • Thank you for the answer. I can find the sdb1 external HDD with lsblk and I can find something with dmesg | more. (How I can put screenshots here?). And what can I do now?. Greetings Feb 17, 2015 at 5:53
  • It's all text, select,copy paste. You could use pastebin to plot more text and just provide a link.
    – user283885
    Feb 17, 2015 at 21:32
  • Hi, I can find this with lsblk es.tinypic.com/view.php?pic=sziv89&s=8#.VOTtD3WG9BR. And I can find this with dmesg | more es.tinypic.com/view.php?pic=xleam8&s=8#.VOTtbHWG9BQ. What can I do to fix the mount of my external HDD. Greetings Feb 18, 2015 at 19:54
  • Ok, it seems the system sees it as sdb1. Could you try: sudo mkdir /media/usb_drive ; sudo mount /dev/sdb1 /media/usb_drive And paste any errors that are reported. More detail error on the mount failure will be added at the end of dmesg, if it fails
    – user283885
    Feb 18, 2015 at 20:06
  • Well with sudo mkdir /media/usb_drive appears me: mkdir: can not create directory "/ media / usb_drive ': File exists ; and with sudo mount /dev/sdb1 /media/usb_drive appears me: mount: / dev / sdb1 is not a valid block device Feb 18, 2015 at 21:22

I got the same error, but in my case, it wasn't because of a corrupted NTFS, but because Ubuntu didn't recognize that the disk was formatted as exFAT. I could open the disk with no problem in Windows. Then I checked the format and saw that it was exFAT. To open it in Linux I installed:

$ sudo apt install exfat-fuse exfat-utils

And the disk could open without any issue.


I used this ntfsfix package to check my external drive

sudo ntfsfix /dev/sdb 

But in some case this /dev/sdb can be /dev/sda1 or /dev/sda2

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.