Unable to access external harddisk properly when using with Windows Server 2003

Posted on 2009-12-23
Last Modified: 2013-11-14
I recently bought two WD external harddisks (USB). When I connect them to a Windows Server 2003 system I'm unable to access them properly. Disk management detects the disks and tells me everything is fine. (they are online, formatted ntfs and a driveletter has been assigned.)

Altough disk management tells me everything is fine, I still can't access the disks. They are listed in the windows explorer, but when I try to access them I get the message the system is unable to access them. When I go to the dos prompt and enter the driveletter it says the device isn't ready.

I have found one way to access the disks:
I need to format the disks using Disk Management.
Then I need to logoff and logon to make the disks accessible.

But when I physsicly detach the disks from the system and re-attach them, I  again can't acces them anymore and the only way to make them accessible is by using a reformat. (wich isn't really a option since I need the data on those disks)

Can anyone tell me what I'm doing wrong?
ps: sorry for my language and grammaticle errors. ;-)

Best regards,

Question by:Clyde_Radcliffe
    LVL 46

    Expert Comment

    Hi Clyde, first of all try to dig in USB controller area. In Device Manager remove all USB controllers (uninstall) while USB devices disconnected. Reboot the system and connect the drive. It will install them again.
    Second, test these drives on another machine. Do they behave same in XP or Windows 7 for example?

    Author Comment


    They don't show this behavior in XP, Vista en Windows 7.
    I will remove the USB controllers and restart the system tonight.
    I willl let you know if it succeeds!
    LVL 46

    Accepted Solution

    Ok. Good luck. Try also reformatting the drives with third party tool:
    Download and install trial. It's fully functional and will let you format the drives. If the problem reproduces even after USB reinstallation find STUBACT.log and BioNTLog.txt files in Drive Backup root folder and post them here. I'll check if anything is wrong with geometry of the drives.

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