After Debugging, hard drive is now seen as unpartitioned space.

Posted on 2007-07-31
Last Modified: 2010-05-18
I have an XP Home machine that came in with a STOP error on reboot with Registry problems. In searching the net for the specific stop error, I came across this thread On page two, Leviathan advised the following procedure for fixing the error:

"First boot to a dos prompt and run debug in the following way, just type it exactly everything should appear as I put it here:

debug (hit enter, you will only see a dash as a prompt, everything else goes caps, bolded text is what you need to type, remember to hit enter at the end of each line)
-F 200 L1000 0
-A CS:100
xxxx:0100 MOV AX,301
xxxx:0103 MOV BX,200

xxxx:0106 MOV CX,1
xxxx:0109 MOV DX,80

Type 80 for the Main hard drive - HD 0, or type 81 for the Second hard drive - HD 1.

xxxx:010C INT 13
xxxx:010E INT 20
xxxx:0110 (Leave this line blank and press the <Enter> key)

After this just restart the machine and start the install process"

I followed the procedure to the letter, and when I booted to the XP install CD, instead of being able to "Repair" Windows, the drive came up as unpartitioned space. I took the drive out of that machine and put it in my diagnostics machine, with the same results. It appears to be an empty drive. I need to get acces back to the data that is on the drive. I have not used any utilities on the drive. I think I need to simply reverse the debugging procedure, but I don't know where to start.
Question by:crazyalligator
    LVL 8

    Expert Comment

    Ack, looks like your partition table has been messed up, either that or maybe your MBR.

    try booting to windows setup from the CD and enter the recovery console (the first repair option you get when you run the setup CD.).

    once you get in type this:
    (you may need to put the drive letter and a colon in there too)
    I.E.  fixboot C:
    and if that doesn't work go back in and do

    LVL 63

    Accepted Solution

    You will either need a partition recovery program or similar

    Check out the free testdisk

    You may also need another more automated program like Getdataback

    I hope this helps !
    LVL 8

    Expert Comment

    Oh there is a good dos boot partition recovery tool for about 20 bucks, it may or may not work for you, you can
    try it for free and if it works then you can buy it and it will let you save the partition.

    Author Comment

    Banks1850, I tried youf first 2 suggestions without any success.

    SysExpert, Your link to TestDisk was exactly what I needed. it is a utility that I am sure I will be using again in the future. Many thanks.


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