This little utility can be used to create files. Big and small. It's most usefull in creating large, sparse files. Output is "C:\file.bin".
Someone came up with the idea, that if you're storing a lot of zeros you can instead write just how many zeros you're storing. In a sparse file, all meaningful or nonzero data is allocated, whereas all non-meaningful data (large ammounts of data composed of zeros) is not allocated. Sparse files are supported on NTFS5. To manage these files in Windows XP, use the fsutil command.