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    Unhappy Hard disk missing 30GB


    Previously, my HDD had a total of 164 GB (180GB promoted). It was divided into C: (21.9 GB) and E: (127 GB). I had the rest of the space as unused partition space.

    I converted my HDD to a dynamic drive to give more space to my C: drive. Unfortunatly on realising that I could not extend or span a partition->dynamic (simple) drive, I tried converting it back to basic but the option was disabled.

    So searching google for answers, I found a solution and I used dskprobe.exe to alter the address at 00C0, third bit from 42 to 07. It worked fine but E: Drive disappeared! I paniced and backed up my remaining files (luckily, my C: Drive was the one I stored important files on). I changed the address back from 07 to 42, but that completely blew my computer. Last time I ever do anything I don't understand.

    I used the windows XP cd and the partition tool found on it to delete E: Partition, and I was planning to also delete C: and convert the entire 160GB into one space. But upon deleting the E: drive, I found that diskpart.exe only displayed 127GB of unpartitioned space!!

    Help would be appreciated, as 30 GB is alot of space for me (30/160=18% of my HDD space). Is this caused by bad sectors or simply that the programs are unable to detect the remaining 30GB?
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    you might try using FDISK and choose the selection to see all the partitions.
    you can then delete any partition currently hiding
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    try rewriting the MBR for the disk
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    Thanks for the replies.

    I tried fdisk and it was only displaying the 127GB (my current C: drive) and 8mb of unpartitioned space. Fdisk can't even detect the remaining space, I must've screwed up my computer bad.

    For the MBR, I reinstalled windows XP (sorry I forgot to include that piece of info), so the MBR might have been automatically reset.

    I am seriously lost here, I mean 30 GB just vanished
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    (^~;?(I don't understand what you were doing well, though.)

    Use powermax or so, low level formatter. It's the fastest.
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    Originally Posted by megumi amatuka
    (^~;?(I don't understand what you were doing well, though.)

    Use powermax or so, low level formatter. It's the fastest.
    Basically I have 30GB missing, 30GB of unformattable, unreadable, undetectable and unpartitionable space.
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    I ran CHKDSK on my HDD
    Code:
    The type of the file system is NTFS.
    
    WARNING!  F parameter not specified.
    Running CHKDSK in read-only mode.
    
    CHKDSK is verifying files (stage 1 of 3)...
    File verification completed.
    CHKDSK is verifying indexes (stage 2 of 3)...
    
    Index verification completed.
    CHKDSK is verifying security descriptors (stage 3 of 3)...
    Security descriptor verification completed.
    
     134206978 KB total disk space.
       4062816 KB in 13852 files.
          3796 KB in 767 indexes.
             0 KB in bad sectors.
         85278 KB in use by the system.
         65536 KB occupied by the log file.
     130055088 KB available on disk.
    
          4096 bytes in each allocation unit.
      33551744 total allocation units on disk.
      32513772 allocation units available on disk.
    Here is a screenshot of Disk Management
    Code:
    http://img390.imageshack.us/img390/3366/screenshotno5.jpg
    As seen here, It displays only 127GB of space when my actual disk capacity is over 160GB (Advertised at 180GB). That means 20GB is for the system stuff; which is expected, but 30 GB is totally missing.
    Last edited by Yycdestroyer; February 2nd, 2007 at 07:49 PM.
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    (^~;?(You may fiddle with diskpart.exe from command console trying to force mount, though.)

    I recommend vendor's diagnostic tools contained in "UBCD".

    Run its advanced test and execute low-level format accordingly.

    (Oo;?(Actually it's not rare issue for XP to lose sight of partitions.)
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    Originally Posted by megumi amatuka
    (^~;?(You may fiddle with diskpart.exe from command console trying to force mount, though.)

    I recommend vendor's diagnostic tools contained in "UBCD".

    Run its advanced test and execute low-level format accordingly.

    (Oo;?(Actually it's not rare issue for XP to lose sight of partitions.)
    How would I force the mounting of this partition?
    And what are the vendor tools?
    Last edited by Yycdestroyer; February 3rd, 2007 at 12:37 AM.
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    (^~;?(Eh? Diskpart is not easy to use and may be not so strong. The know-how is list blah and select blah. However Disk Management is the GUI simplified version of this.)

    http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/diskpart.mspx

    Each HDD vendors provide tools, e.g. Powermax from Maxtor, Sea tool from Seagate. If you burn UBCD, you'll get them at a time and more.

    As a generic floppy, the below would be convenient.

    http://hddguru.com/content/en/software/2006.02.10-Magic-Boot-Disk/

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