missing space on drive

December 4, 2009 at 13:40:11
Specs: Windows XP/vista, p4 3 ghz 2gb
i just notice one of my drive i use to store stuff of is missing a few gig windows says it 45gb and showing free space 21gb and thier only two folder in thier one 19.3gb and one 1.3gb so it seem like i am missing 4gb

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December 4, 2009 at 13:45:57
post the results of a chkdsk for review

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December 4, 2009 at 14:06:59
Decimal vs. Binary:
For simplicity and consistency, hard drive manufacturers define a
megabyte as 1,000,000 bytes and a gigabyte as 1,000,000,000 bytes.
This is a decimal(base 10) measurement and is the industry
standard. However, certain system BIOSs, FDISK and Windows
define a megabyte as 1,048,576 bytes and a gigabyte as
1,073,741,824 bytes. Mac systems also use these values.
These are binary (base 2) measurements.
To Determine Decimal Capacity:
A decimal capacity is determined by dividing the total number of
bytes, by the number of bytes per gigabyte
(1,000,000,000 using base 10).

To Determine Binary Capacity:
A binary capacity is determined by dividing the total number of
bytes,by the number of bytes per gigabyte
(1,073,741,824 using base 2).

In other words, for example---
The Decimal Capacity of a 40GB HDD is
The Binary Capacity is

My 60GB HDD is 55.78
Computers use Binary.

The larger the HDD, the more you lose.

OR see
My thoughts are.......
In Windows XPs NTFS file system, one Sector on the harddrive
amounts to 4,000 bytes. If a file is 1,000 bytes in size,
then that file will take up a full Sector, and you will lose

If a file is 40,001 bytes in size, the it will use 11 Sectors,
and you will lose 3,999 bytes of space.

Right click on a file,
then click Properties,
then look on the General tab,
you will see two pieces of information, "File size", and "Size on Disk".
"File Size" might be 100 bytes, and yet
"Size on Disk" would be 4,000 bytes.

I find LOG files in Windows that show
0 bytes of File Size,
4,000 bytes of Size on Disk.
Hdd size loss:

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December 4, 2009 at 14:08:55
Are you allowing hidden files and folders to be viewed? If not do so. One of the folders should be System Volume Information folder. This is where System Restore points are hidden. Possibly this is where your missing space went.

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Related Solutions

December 4, 2009 at 14:18:54
Further to Chuck2's post above the easiest way to determine the usable size of your drive is to multiply the manufacture's figure by 93%. The resulting figure is the usable space. 45*.93=41.85GB. Add up the folders and free space you have and they come to 41.6GB. I do not see that you are missing any space. By the way 45GB is an odd figure. Is this a partitioned drive?

PS ignore my above post as it is not relevant.

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December 4, 2009 at 14:28:58
the sizes i gave was what windows said as on disk and when i let it show me hidden file and folder thier ainy hidden ones on this disk

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December 4, 2009 at 14:33:32
Folks we can yack about this all day long but without a chkdsk report it's a moot point.

do you know how to do a chkdsk?
do you know how to post it here?

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December 4, 2009 at 14:35:17
just check sytem restore is turn off on this drive

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December 4, 2009 at 14:45:12
you have hidden and system files being shown. You will see used disk space which includes system restore points.

Not a good idea to turn off unless you are addressing a malware infection.

Still waiting for that chkdsk report.
Will be curious if it says "f parameter not specified"

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December 4, 2009 at 15:50:29
reason i dont have system resore on that drive as i use it to store file and i got a copy of them on another drive

i think i know how to do a chkdsk but not how to get a report from it and post on here

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December 4, 2009 at 17:18:33
i think i know what it could be but not sure if this is right
the recycle bin reseved 3.99gb so could that be what i am missing

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December 5, 2009 at 04:35:47
Either hidden file, very large files (2+ Gig) or RecycleBin related files.

Just do (replace X with your drive letter concerned)

chkdsk X:
dir X:\

And post the ouput

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