Possible Duplicate:
Has Microsoft improved Scandisk, CHKDSK and Defrag in Windows 7?
Has chkdsk been updated in Windows 7? Is there any difference between running chkdsk on Windows 7 vs. running it on Windows XP?
Possible Duplicate:
Has Microsoft improved Scandisk, CHKDSK and Defrag in Windows 7?
Has chkdsk been updated in Windows 7? Is there any difference between running chkdsk on Windows 7 vs. running it on Windows XP?
For one thing, the CHKDSK on Windows 7 supports the newer features of NTFS, and also has a bad block rescan feature. What this does is re-check every sector, including those marked as bad, and see if they are still bad. This is important if you imaged a bad hard drive over with bad blocks already on it; once Windows 7 (or Vista) sees this bad block, it doesn't write over it. With the /b option, it rechecks that and reclaims the space as available for you
have not found anything different in my usage, but apparently there are some very minor differences just because windows7 is much newer, as you can see here:
http://technet.microsoft.com/en-us/library/62912a3c-d2cc-4ef6-9679-43709a286035