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Thread: USB stick mounts read only

  1. #1
    Join Date
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    USB stick mounts read only

    I have a Sandisk Cruiser I am trying to use with Ubuntu 9.04 and it mounts only as Read Only. It is immediately recognized and mounted at /media/disk but I cannot write to it no matter what I do.

    I have tried to chown the drive and chmod but each time I get a message that the drive is read only and I cannot change ownership nor permissions.

    It worked with Ubuntu 8.04 and it works with Virtual Windows XP in VirtualBox running on Ubuntu 9.04.

    Any suggestions would be welcome.

  2. #2
    Join Date
    Apr 2008
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    Ubuntu 10.04 Lucid Lynx

    Re: USB stick mounts read only

    Does it boot properly?

    Simply sounds like presistence isnt working.

    Using the built-in usb creator in ubuntu + an iso. You should be able to adjust the "stored in reserved extra space" move it to like max on the bar and it should work.

  3. #3
    wojox is offline I Ubuntu, Therefore, I Am
    Join Date
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    Re: USB stick mounts read only

    Are you doing this through the terminal or nautilus?

  4. #4
    Join Date
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    Ubuntu 10.10 Maverick Meerkat

    Re: USB stick mounts read only

    Post the output from (in terminal):

    Code:
    cat /etc/mtab

  5. #5
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    Re: USB stick mounts read only

    Here is the result of cat /etc/mtab


    $ cat /etc/mtab
    /dev/sda6 / ext3 rw,relatime,errors=remount-ro 0 0
    tmpfs /lib/init/rw tmpfs rw,nosuid,mode=0755 0 0
    proc /proc proc rw,noexec,nosuid,nodev 0 0
    sysfs /sys sysfs rw,noexec,nosuid,nodev 0 0
    varrun /var/run tmpfs rw,nosuid,mode=0755 0 0
    varlock /var/lock tmpfs rw,noexec,nosuid,nodev,mode=1777 0 0
    udev /dev tmpfs rw,mode=0755 0 0
    tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
    devpts /dev/pts devpts rw,noexec,nosuid,gid=5,mode=620 0 0
    fusectl /sys/fs/fuse/connections fusectl rw 0 0
    lrm /lib/modules/2.6.28-13-generic/volatile tmpfs rw,mode=755 0 0
    none /proc/bus/usb usbfs rw,devgid=46,devmode=664 0 0
    securityfs /sys/kernel/security securityfs rw 0 0
    binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,noexec,nosuid,nodev 0 0
    //192.168.0.49/Volume_1 /media/RAID cifs rw,mand 0 0
    //192.168.0.49/Volume_2 /media/*******AK cifs rw,mand 0 0
    gvfs-fuse-daemon /home/mac/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev,user=mac 0 0
    /dev/sdb1 /media/disk vfat rw,nosuid,nodev,uhelper=hal,shortname=mixed,uid=10 00,utf8,umask=077,flush 0 0

  6. #6
    Join Date
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    Ubuntu 12.10 Quantal Quetzal

    Re: USB stick mounts read only

    Can you modify it with:

    Code:
    sudo nautilus /media/disk
    ?

    If so, unmount it and change ownership of /media/disk.

  7. #7
    Join Date
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    Re: USB stick mounts read only

    Good Idea but No Joy

    When I try your suggestion I get the following:
    ** (nautilus:3754): WARNING **: Unable to add monitor: Operation not supported

    --- Hash table keys for warning below:
    --> file:///media/disk

    (nautilus:3754): Eel-WARNING **: "nautilus-metafile.c: metafiles" hash table still has 1 element at quit time (keys above)

    (nautilus:3754): Eel-WARNING **: "nautilus-directory.c: directories" hash table still has 1 element at quit time
    mac@T-61:~$

    Mac

  8. #8
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    Re: USB stick mounts read only

    We can put PAID to this. The problem appears to be that the SanDisk Cruzer has built-in security that prevents the stick from mounting as read/write on Ubuntu 9.04. (Oddly it will work perfectly with V. 8.04).

    The solution was to put the stick into a Windows System and re-format the stick to remove the security partition (also removes the data partition). It now auto-mounts and works as a simple (non secured) USB storage device with read/write privileges.

  9. #9
    Join Date
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    Ubuntu 12.10 Quantal Quetzal

    Re: USB stick mounts read only

    The first thing I do when I buy any type of storage media is wipe it. Sorry I was assuming everybody did that. You can implement your own security if you are worried about that. I would use at least 128 bit encryption.

  10. #10
    Join Date
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    Re: USB stick mounts read only

    Yes that works BUT should not be necessary, at least not if all the dependencies required to work with DOS formated devices are installed.

    It was not necessary with Ubuntu with versions 8.04 and earlier. Something has changed in later versions which has created complications, not only when using some USB devices but also connecting formerly compatible Network Accessible Storage Devices.

    Some people have been able to circumvent the problem with changes to the OS but nothing they have done appears to work on my 9.04 system.

    Quel frustration!

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