Discrepancy in hard disk size, reported space unaccounted for...

Discussion in 'Computers & Technology' started by dump, Jan 6, 2008.

  1. dump

    dump Turbo Monkey

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    Disclaimer:
    This is not to report that my reported 80GB drive doesn't format to 80GB...


    - My girlfriend's laptop has an 80GB drive in her laptop (Lenovo/IBM)
    - It formats to something like 74GB
    - 4.5 of which is partitioned as a recovery partition (I believe)
    - and the rest shows up as a 69GB in windows.

    She realized today that she had a surprisingly small amount of space remaining (15GB) even though she hasn't really put much on the box.

    I did a little diagnostic with WinDirStat (http://windirstat.info/) to see if her assumptions were correct & sure enough we were only able to count 36GB of actual disc usage (all files, OS included.)

    So here's the math.

    69GB (total) - 36GB (files) = 33GB (free)

    instead, windows is reporting only 15GB free.


    Has anyone run into this before? Any thoughts on what might be going on here? I haven't seen this before in my many years of windows usage.

    thanks.
     
    #1 -   Jan 6, 2008

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  2. DirtyMike

    DirtyMike Turbo Fluffer

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    xp, or Plug and Pray, er I mean Vista
     
    #2 -   Jan 6, 2008
  3. dump

    dump Turbo Monkey

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    win xp
     
    #3 -   Jan 6, 2008
  4. DirtyMike

    DirtyMike Turbo Fluffer

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    Hmmm, First part I can explain, well kinda I forgot the exact terminoligy, but there isnt a back up partition, but you see a "loss" of storage from whats on teh HD to whats reported because windows simply measures/meters diffeently than the Manf does, as for the second part, sounds like its just a glitch in the reporting. I wouldnt worry about it too much, as long as widnows wont let you save something because it tells you its full. The only other thought I have is that you possible have a corrupt hard drive, but thats not too terribly likely if you not having other troubles
     
    #4 -   Jan 6, 2008
  5. bent^biker

    bent^biker Turbo Monkey

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    found the problem, seriously though, I like how windows will just do things like that "for" you :plthumbsdown:
     
    #5 -   Jan 6, 2008
  6. Transcend

    Transcend My Nuts Are Flat

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    Virtual memory/Ram disk usage can sometimes affect the disk size reporting, could that be it?
     
    #6 -   Jan 6, 2008
  7. DirtyMike

    DirtyMike Turbo Fluffer

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    Yeah for instance My 60gig main drive registers at a 55.6

    and the 160 External reads as a 149
     
    #7 -   Jan 6, 2008
  8. sanjuro

    sanjuro Tube Smuggler

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    #8 -   Jan 6, 2008
  9. dump

    dump Turbo Monkey

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    I'm not sure... we're talking about 18GB. Seems large for virtual memory. It also didn't change after a restart... but you're right, it could be...

    @bent^biker
    It's a nice windows machine as they go.

    @DirtyMike
    See my disclaimer. The 80Gb drive formats to 74Gb, I checked w/ the disk utility and there is a separate partition that takes up 4.5GB. I assume this is a backup utility/partition. The other partition is 69GB... this is what I'm talking about.
     
    #9 -   Jan 6, 2008
  10. DirtyMike

    DirtyMike Turbo Fluffer

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    Right, got that part, I think its just a reporting glitch though. It is possible to have a corrupt drive, but I dont think thats the case. My last PC did the same thing, when I would use up the storage, It would always tell me something else that was somehow very different, in very inconsistant measurements.
     
  11. dump

    dump Turbo Monkey

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    strange. thanks for the info. I'll tell her not to worry about it :) I actually just got her a 250Gb WD Passport drive, so I'm not sure what the problem is ... ;)
     
  12. Silver

    Silver find me a tampon

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    How much space is dedicated to system restore and the recycle bin? I'm not sure how Windows handles reporting that space...
     
  13. jimmydean

    jimmydean The Official Meat of Ridemonkey

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  14. Reactor

    Reactor Turbo Monkey

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    1. drive makes usually report gigabytes as one billion, when a true gigabyte is 1.07 billion bytes. Right off the bat you have lost 7% of the space due to a difference in terminology.

    2. Slack space. Disk are allocated in clusters, the size varies by OS and format type. A file almost never takes up exactly a cluster, some space is always wasted. If you have a bunch of small files the amount of wasted space tends to be larger. I've seen the mount of slack space be 25% 0r more in many cases.
     
  15. dump

    dump Turbo Monkey

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    Gotcha... thanks for the info.
     
  16. binary visions

    binary visions The voice of reason

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    15gb still seems like a lot to go missing, though, even taking into account the size of a gig, slack space, etc.

    How old is this drive? It is possible that there is a chunk of the drive marked as bad. Also, have you tried just opening C:\, highlighting all the folders, right clicking and clicking on properties to see what kind of space is being reported?
     
  17. dump

    dump Turbo Monkey

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    Yes, I've done that... and used WinDirStat to confirm. This is where I got the actual number of GB used.

    The drive is a year old. I bought the machine for her last christmas.
     
  18. dump

    dump Turbo Monkey

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    btw, did you see my sov pics?
    |
    |
    V
     
  19. Changleen

    Changleen Paranoid Member

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    Not to be sexist, but general girl style pc use = slack space a-go-go. 40 trillion emails and small photos, and never a defrag to be heard of.
     
  20. binary visions

    binary visions The voice of reason

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    I did not. Looks like you posted at the tail end of my vacation up north - that looks sweet! Clean lines. You got that frame back when they first released it, right? I seem to remember something about you wanting a green one, then not wanting to wait for the delayed paintjob and settling for a silver... only to have the green come out of the shop a couple days after that. :p

    Wish I was riding mine. Ah well, it'll still be there when I start again. Not enough hours in the day.

    Changleen; I've got about 40 trillion emails and 20gb of photos, what are you trying to say? ;)

    Even at that... 15gb is a lot.
     
  21. dump

    dump Turbo Monkey

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    nice. Before she came to me w/ the problem. She just ran a defrag.
     
  22. dump

    dump Turbo Monkey

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    Yup, that's pretty much the story. I'm quite happy with the silver though... fun bike.