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Windows XP, 2003 (v3.1)
Windows 2000 (v3.0)
Windows Me, 98, and 95 ORS2
Hard Disk | 255
Performance
To find out which filesystem is currently being used by a particular drive on
your PC, just right-click the drive in Windows Explorer and select Properties.
Or, open the Disk Management utility (diskmgmt.msc) to see an overview
of all of your drives.
Windows NT 4.0 (v1.2)
Windows 95
Understanding Cluster Sizes
Clusters are the smallest units into which a hard disk??™s space can be divided.
A hard disk formatted with the traditional FAT system, found in Windows 95
and an ancient operating system called ???DOS,??? can have no more than
65,536 clusters on each drive or partition. This means that the larger the hard
disk, the larger the size of each cluster.
The problem with large clusters is that they result in a lot of wasted disk
space. Each cluster can store no more than a single file (or a part of a single
file); if a file does not consume an entire cluster, the remaining space is
wasted. For example, a 2 GB drive would have a cluster size of 32 KB; a 1 KB
file on a disk with a 32 KB cluster size will consume 32 KB of disk space; a 33
KB file on the same drive will consume 64 KB of space, and so on. The extra
31 KB left over from the 33 KB file is called slack space, and it can??™t be used
by any other files. With thousands of files (especially those tiny shortcuts littered
throughout a Windows installation), the amount of wasted slack space
on a sizeable hard disk can add up to hundreds of megabytes of wasted space.
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