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Thread: Losing GB's

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    Losing GB's

    I installed a WD SATA II hard drive in a PC this week, which the box alleged was a 250 GB drive. When I installed WinXP Pro and let the drive be formatted NTFS by Windows, it showed up as only 232 GB's. Is this "normal" to lose this much of capacity after formatting? I know every drive "loses" some capacity when formatted, but this amount seems excessive.

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    Re: Losing GB's

    That is probably not too far off from normal. Disk manufacturers advertize the unformatted capacity of the drive, which is the capacity if the records on the disk were a full track each, so that there would be no lost space between the records. This would be efficient for space, but would make the drive very slow since every read and write would have to be a full track on the disk. Therefore, you lose a lot of space when you format the disk into records that are efficient for accessing the data. Then on top of that, you have to put the file system structure on the disk. This is all of the space that the operating system has to use to keep track of where all your files are located, and where all the free space is located. 7% is not too bad for all that.
    Legare Coleman

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    Re: Losing GB's

    <P ID="edit" class=small>(Edited by JohnGray on 15-Sep-06 17:07. slight calculator problems!)</P>See the thread starting at <post#=428,397>post 428,397</post#>, nearly two years ago!

    John

    PS 250,000,000,000 divided by 1024 three times gives you 232.83 GB, so that explains almost your entire 'loss' in one hit...
    <font face="Script MT Bold"><font color=blue><big><big>John</big></big></font color=blue></font face=script>

    Ita, esto, quidcumque...

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    Re: Losing GB's

    John,
    232 GBs is about right for the formatted capacity of a 250 GB hard drive.
    BOB
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    Re: Losing GB's

    If you want to see your hard drive as Windows "sees" it, open Computer Manager
    (click Start | Run, type COMPMGMT.MSC and hit Enter)
    and on the left pane click on Disk Management under Storage.
    On the lower right pane you will see the size of your hard drive and the size of your partition(s).

    However, third-party utilities (as Partition Magic) may report slightly different size of the drive available - usually additional 8 MB of "unformatted space". Remember, 8 MB = 0.008 GB (in decimal system)...

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    Re: Losing GB's

    John (AKA JohnGray) has hit the nail on the head. If interested, you can read a 2003 White Paper When One Billion does not equal One Billion by James Wiebe, CEO of WiebeTech LLC

    The paper provides a good explaination of how Hard Drive Manufactures use the Decimal ystsem to specify the Hard Drive size, PC Operating Systems use Binary to report the Hard Drive size.

    FWIW
    Scott

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