Results 1 to 6 of 6

Thread: Safe to remove USB device w/o Unmount?

  1. #1
    Join Date
    Aug 2009
    Beans
    248
    Distro
    Ubuntu 9.10 Karmic Koala

    Safe to remove USB device w/o Unmount?

    Hello. I'm just wondering how safe is it to remove USB devices, such as an iPhone and a USB stick, without unmounting it first.

    Windows also preaches "safely removing" anything USB before disconnecting it, but you can remove most USB devices with no repercussions.

    FWIW, I always unmount when it comes to a conventional hard drive w/ USB converter that contains important data.
    If your problem is solved, please don't forget to come back and post the solution.
    Also, mark the thread "Solved" (Thread Tools > Mark This Thread as Solved).
    RIP Clara

  2. #2
    Join Date
    Nov 2007
    Beans
    460

    Re: Safe to remove USB device w/o Unmount?

    no its not, and its not safe in windows either. You have to click add/remove hardware in win, then select the device. You risk losing data and confusing your system if you do.

    Use

    Code:
    sudo umount /dev/sdd
    or whatever your usb device is named in dmesg, then wait until the mount point no longer shows your device files.

  3. #3
    Join Date
    Nov 2007
    Beans
    460

    Re: Safe to remove USB device w/o Unmount?

    You can also unmount by right clicking the icon of the device as well, though I am not sure what your usb converter does. Is that a program that unmounts usb devices? kids these days and their new-fangled gadgets....

  4. #4
    Join Date
    Jan 2007
    Location
    London, UK
    Beans
    3,525
    Distro
    Ubuntu Development Release

    Re: Safe to remove USB device w/o Unmount?

    Can have pretty bad repercussions by unplugging usb data device without unmounting. It can lead to data corruption if it is reading/writing.it can make your usb device undetectable under OS. it can make it read-only device then you may need to reformat the whole file system on it possibly losing data.
    You came empty handed, that is how you shall leave. Whatever you claim as yours today, belonged to someone else yesterday, will be someone else's tomorrow.

  5. #5
    Join Date
    Jul 2007
    Location
    Melbourne, Australia
    Beans
    3,475
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Safe to remove USB device w/o Unmount?

    If not unmounted correctly, the filesystem is viewed as being 'unclean' and linux will not mount it in case there is something wrong. Windows is not quite as discerning and despite advocating a 'safe removal', windows will still mount the filesystem. If you want to check, just pull a usb device out of windows without using 'safely remove', then try to mount it in linux. You get a message in linux about the filesystem not being shutdown properly. You can fix it by reinserting in windows and going through the 'safely remove' procedure.
    Windows is the best virus detector on the market!
    Ubuntu attracts Human Beings - Windows attracts viruses and worms

  6. #6
    Join Date
    Aug 2009
    Beans
    248
    Distro
    Ubuntu 9.10 Karmic Koala

    Re: Safe to remove USB device w/o Unmount?

    Thank you guys for the information.
    If your problem is solved, please don't forget to come back and post the solution.
    Also, mark the thread "Solved" (Thread Tools > Mark This Thread as Solved).
    RIP Clara

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •