* 32 bit bad blocks check is too limited for large drives
and result in erroneous computations
* 32 bit also means that 2TB would be absolute limit, which
may be too low in case for USB HDD checks
* This fix makes bad blocks check and related calls 64 bit compliant
* also improve on bad block reports
* When using Win7 installation ISOs, XP would return the error:
[0x00000456] The media in the drive may have changed
* This seems to be due to unmounting of the drive before writing
the PBR
* Also, our ms-sys/NTFS code wasn't identifying NTFS properly on XP