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Thread: External disk stuck in a readonly state!

  1. #1
    Join Date
    Jun 2021
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    1

    Exclamation External disk stuck in a readonly state!

    Hello, I can't write onto my External Disk, it is working fine on Windows and chkdsk found no errors! But on Ubuntu it is readonly and I can't write to it. It is strange, I already reformatted the disk and it was working fine for a short time on Ubuntu and I didn't use it on Windows for anything, except to copy some files from it. And now again: it is stuck in readonly state on Ubuntu! I tried following commands, but they did not work:
    Code:
     sudo mount -o remount,uid=1000,gid=1000,rw /dev/sdc1
    Code:
     command1:sudo umount /dev/sdc1  command 2: sudo mkdir toshibaHDD command3: sudo mount -o rw,uid=1000,gid=1000,user,exec,umask=003,blksize=4096 /dev/sdc1 /media/toshibaHDD
    Any help appreciated TY! PS: sorry about formatting, indentation doesn't work!
    Last edited by nyung47; June 24th, 2021 at 04:34 PM.

  2. #2
    Join Date
    May 2010
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    1,614

    Re: External disk stuck in a readonly state!

    What file system are you using on the file system please?

  3. #3
    Join Date
    May 2010
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    1,614

    Re: External disk stuck in a readonly state!

    Before you unplug the device physically, do you use the safe remove feature in the OS before pulling the cable?

  4. #4
    Join Date
    Jun 2009
    Location
    SW Forida
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    Hidden!
    Distro
    Ubuntu

    Re: External disk stuck in a readonly state!

    If NTFS, did Windows set fast boot on?
    That sets hibernation flag and then the Linux NTFS driver cannot default mount the partition.
    UEFI boot install & repair info - Regularly Updated :
    https://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  5. #5
    Join Date
    Jun 2021
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    2

    Re: External disk stuck in a readonly state!

    Quote Originally Posted by ActionParsnip View Post
    What file system are you using on the file system please?
    NTFS
    Quote Originally Posted by ActionParsnip View Post
    Before you unplug the device physically, do you use the safe remove feature in the OS before pulling the cable?
    I usually turn off PC and then disconnect it. Because Safely Remove option is missing! But I could remove it possibly ,while PC was on, by accident.
    Quote Originally Posted by oldfred View Post
    If NTFS, did Windows set fast boot on? That sets hibernation flag and then the Linux NTFS driver cannot default mount the partition.
    I don't use fast boot! Nor fast startup, nor hibernation!

  6. #6
    Join Date
    May 2010
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    Re: External disk stuck in a readonly state!

    If you connect it to a different Windows system then safe remove it, does it help?

  7. #7
    Join Date
    May 2008
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    1,978
    Distro
    Ubuntu 20.04 Focal Fossa

    Re: External disk stuck in a readonly state!

    Quote Originally Posted by nyumg47 View Post
    Because Safely Remove option is missing!
    Are you using Windows 10?

    File Explorer > Locate Drive > Right Click > Eject
    A message should appear:- Safe to remove hardware

    Windows updates sometimes re-enable fast start-up without user intervention.
    Last edited by tea for one; June 24th, 2021 at 11:35 PM. Reason: Added comment about fast start up

  8. #8
    Join Date
    Jun 2021
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    2

    Re: External disk stuck in a readonly state!

    Quote Originally Posted by ActionParsnip View Post
    If you connect it to a different Windows system then safe remove it, does it help?
    Problem is that I don't have "safely remove" always visible in "Files" on Ubuntu. Then I should probably disconnect it, only after I turn off PC, if I don't forget, which could happen... Also it is not good for a disk!
    Quote Originally Posted by tea for one View Post
    Are you using Windows 10? File Explorer > Locate Drive > Right Click > Eject A message should appear:- Safe to remove hardware Windows updates sometimes re-enable fast start-up without user intervention.
    That actually worked, many thanks

  9. #9
    Join Date
    May 2008
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    1,978
    Distro
    Ubuntu 20.04 Focal Fossa

    Re: External disk stuck in a readonly state!

    Quote Originally Posted by nyumg47 View Post
    Problem is that I don't have "safely remove" always visible in "Files" on Ubuntu. Then I should probably disconnect it, only after I turn off PC, if I don't forget, which could happen... Also it is not good for a disk! That actually worked, many thanks
    That looks like a step forward.

    In Files for Ubuntu, you also right click to expose eject or safely remove.

    Can you now read/write to the drive in Ubuntu?

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