Just a comment for general
information for FAT
(probably NOT specifically suited to the OP).
PartedMagic (included in UBCD) includes dosfstools: http://www.daniel-baumann.ch/software/dosfstools/
The Freedos resources include tools for FAT
, the older port of "fsck" and "chkdsk" (with the same name as the MS tool) : http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/dos/chkdsk/
As a general rule, if you have the original MS tools for its file sytems, you should use those MS tools.
In those cases where you don't have the MS tools:
To be clear, if you do NOT use FAT
( but NTFS, in most current cases of Windows users), please find a better-suited tool (as suggested in a previous post) than those I just mentioned in this post.