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External USB mass storage device mounts, but no mapping

Discussion in 'Hardware' started by y_stoner, Mar 28, 2005.

  1. y_stoner

    y_stoner Guest

    I have an external USB mass storage device and I am running Win2K
    on my PC. Up until last week, when I plugged in the external drive, it
    would mount and assign a drive letter in windows explorer. This week,
    it mounts the drive, calls it a USB mass storage device, but there is
    no way for me to access it! I have tried uninstalling all the USB
    drivers and reinstalling to no avail. I have also tried plugging into
    all the other USB ports on my machine.
    Under the device manager windows tells me that this device is
    working properly. If anyone know of something else I can try so that I
    can access the data on the drive I would greatly appreciate it!!!

    y_stoner, Mar 28, 2005
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  2. wrote in @l41g2000cwc.googlegroups.com:

    First of all, make sure the problem isn't caused by your operating
    system. To do this, plug the harddisk in a different system. If it runs
    properly on a different machine, even with the same operating system,
    something is wrong with your own windows installation.

    If this isn't the case, something is wrong with the storage device. This
    can be caused by several things. The most common problem is that the
    drive was not properly dismounted. So maybe you have put some data on the
    drive and afterwards just pulled the USB plug out, without choosing
    "Unplug or eject the hardware". That option can be found in the task bar
    of windows 2000 next to the little clock. Right click on the icon with
    the green arrow gets you in the screen where you can dismount the storage

    Another possibility is malfunction of hardware of the storage device. The
    part that converts the USB interface to an UDMA interface sometimes
    fails. Of course the hard disk itself can have a defect as well.
    If the harddisk itself has a defect, in example: its not spinning up or
    it's only making a loud ticking or beeping noise, you will need
    professional help to get your data back.

    Most harddisk manufacturers have software tools on their websites to
    diagnose the disk, even when it is connected to USB. So it seems wise to
    check the website first.

    Saving the data and solving the problem:

    If the problem is caused by your operating system, saving the data is

    Attach the disk to a different machine and make a backup on DVD R or on
    Then solve the problem on your own machine. The most work is reinstalling
    the operating system, but this always works as long as there is nothing
    wrong with the hardware.
    Another way is just reinstalling all chipset- /motherboard drivers, but
    since you have been busy with drivers already without success, maybe its
    faster to just reinstall windows.

    If the problem is caused by the device its a bit more tricky, because you
    need to open the device for that. Remember that if you do that, the
    warranty will probably be over. So ask yourself if the data is more
    valuable then the hardware.

    Open the case. Most cases are screwed together and sometimes you need to
    break one or more warranty seals. When the case is open you will see a
    harddisk, just the same as in your desktop system. First unscrew the
    harddisk, then carefully lift it out and remove the data and power cable.
    Then place the harddisk in a desktop system and attach it as a slave or
    secondary master.

    When the system boots up, it may give a message that the device was not
    probably dismounted and that it needs to check the disk. Just let it
    check the drive and afterwards, when windows has started, you can make a
    backup. When the backup is ready, just turn off the system and rebuild
    both desktop and external harddisk. It maybe necessary to repartition the
    external harddisk. This can be done by right clicking on "My computer",
    then choose: "Manage" and in the left part of the management window you
    will see "Disk management". Select that one and you can repartition and
    format the drive.

    It is also possible the partition information on the drive is gone. In
    that case the drive won't be visible in windows, even if it was properly
    connected. Check the drive with suitable software for that. Most software
    provided by the harddisk manufacturer is free and can check the drive for
    physical and electronic errors. Partition magic can also help, it can
    easily see if the partition table is corrupt. If so, you will need
    special data recovery software to restore the partition table.

    Also think of the possibility of professional harddisk recovery. For a
    few hundred dollars you can let your data be recovered by special data
    recovery companies. If your data is very valuable that might be a good

    Good luck,

    Emile Jackson, Apr 4, 2005
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