CHKDSK discovered free space marked as allocated in the volume bitmap.

Discussion in 'Home Networking' started by gym, May 19, 2006.

  1. gym

    gym Guest

    Can anyone help with this one please

    My computer has an 80gig hard drive, I have three accounts set up in
    XP, when I check the C drive it tells me that I have used 45Gig and
    have around 35gig free.
    I have been into Windows explorer, checked the accounts and counted the
    space used up by the likes of Windows, program files and the like and
    it comes to no more than 15Gig, I cannot find the extra 30Gig that is
    supposed to be used up.
    I ran CHKDSK and it came up with

    CHKDSK discovered free space marked as allocated in the volume bitmap.
    Windows found problems with the file system.
    Run CHKDSK with the /F (fix) option to correct these.

    I went into MY COMPTER right clicked the Cdrive and ran the error
    checker clicking the box marked automatically fix problems, I restarted
    the computer, it checked the files then started up again but It did not
    free up any of the 45Gig,

    Can anyone help with this please.

    Kind Regards
    gym, May 19, 2006
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  2. gym

    Al Reeve Guest

    If I remember correctly, CHKDSK is a DOS program, the windows tool runs
    SCANDSKW, a similar program with a nice GUI but different abilities. CHKDSK
    /F should be run from a boot disk that loads a OS to memory and effectively
    works on the drive with the file system not mounted. SCANDSKW tries to do
    the same but as windows is running and the file system mounted it cannot do
    some things. It may be able to do some stuff only after a reboot.

    Al Reeve
    Al Reeve, May 19, 2006
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  3. gym

    Nick Austin Guest

    Have you emptied the Recycle Bin?

    Nick Austin, May 20, 2006
  4. gym

    Trev Guest

    Could it be 3 x 15Gb
    Trev, May 20, 2006
  5. gym

    Dougal Guest

    Start/Settings/Control Panel/Administrative Tools/Computer
    Management/Storage/Disk Management ...... should give you some clues.
    (Assuming that XP looks like 2000 in this respect.)
    Dougal, May 20, 2006
  6. gym

    gym Guest

    Thanks for replies
    Have started CHKDSK from reboot, empty recycle bin.
    management tells me "only one drive no partition, 42% used, 31G free
    space of an 80G drive and Healthy"

    Still don't know where the other 30G has gone

    gym, May 21, 2006
  7. gym

    Fred Guest

    I use ExploreXP from to gauge sizes of
    directories etc for this sort of thing. It might be worth a look and to do
    some sums to independently verify Windows own Explorer.
    Fred, May 22, 2006
  8. gym

    gym Guest


    How did this happen, I switched off System Restore, and rebooted, that
    was it.

    First of all I tried to Restore the computer to a point two months ago,
    it took an hour and a half to do this, when I opened up the new point I
    had only 10% FREE space left, I quickly undid last Restore point, when
    I arrived back to where I started I had only 12% Free, so, switched off
    system restore and all is well, fingers crossed,
    I am no expert but I have a niggle that the problem had something to do
    with iTunes, I could be totally wrong, just a feeling.
    Thank you all for replies and help.

    That problem was on the kid's laptop, my desktop has an 80G hard
    drive but it is partitioned, unlike the laptop,
    it has a Cdrive, dackup drive and recovery drive, C drive is nearly
    full, is there a simple way to make the Cdrive larger and the backup
    Thanks again
    gym, May 23, 2006
  9. gym

    gym Guest

    Thanks Fred
    Will have a look at it
    gym, May 24, 2006
  10. gym

    Hawkins Guest

    You can change the maximum space that system restore can use by changing its
    settings. The default in XP is 12% of the hard drive. It can be adjusted
    down to a Max of 200MB. This would still allow 2 or 3 restore points which
    could come in handy.

    Hawkins, Jun 11, 2006
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