CHKDSK is not available for RAW drives

"The type of the file system is RAW." means that CHKDSK was unable to determine the file system used on the drive, and considers it to hold unknown data. CHKDSK is made for verifying the filesystem data structures, and it doesn't make sense to verify something it doesn't know which way is correct. (Try spell-checking a text in a language you can't read.)

That the filesystem is not recognized means the "inconsistencies" are at a level beyond CHKDSK's expertise. However, the fact that you are able to boot from said filesystem confuses the hell out of me.

One possibility is that there is some sort of malware (or anti-malware) that is preventing CHKDSK access to the raw disk device. Run a RootkitRevealer scan and see if it shows anything interesting. If you have a Windows 7 install disc, try running CHKDSK from its "Repair" mode.