Re: Used space on an NTFS volume

The size of a given file isn't usually exactly divisble by the allocation
unit size. If you have a 4K allocation unit and 10 allocation units on the
disk, and the file is 3.8K, then you would count 3.8 K of files and you
would have 9 allocation units lef or 36K; although you've only used 3.8K,
4K has been used on the disk. This is of course an oversimplification and
doesn't account for the various NTFS indexes or the space consumed by
directories or the MFT, etc., but you get the picture.




"David Crow" <david_dot_crow@xxxxxxxxxx> wrote in message
news:%23IbXcHI$HHA.1184@xxxxxxxxxxxxxxxxxxxxxxx
Ok, I granted myself access to System Volume Information, and now the
numbers are "reversed." I am now counting 30.3GB used by files, but
GetDiskFreeSpaceEx() is only reporting 28GB used.

?????

"David Crow" <david_dot_crow@xxxxxxxxxx> wrote in message
news:OjXVyUG$HHA.3780@xxxxxxxxxxxxxxxxxxxxxxx
Using some Win32 code, I can account for 25.3GB out of the 28.2GB that is
being used. Where's this other 2.8GB going to? The MFT, and its mirror,
only consume 125.5MB.

Thanks,
DC





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