confusion

[Aryeh M. Friedman]

I just set up mirroring on my dual boot fb-7.1/vistaX32SP1 machine (the 
dual boot works fine) but I got this message when I attempted to mount 
vista via sysutils/fusefs-ntfs:

Actual VCN (0x3369700000100) of index buffer is different from expected 
VCN (0x1).
Failed to mount '/dev/mirror/gm0s1': Input/output error
NTFS is either inconsistent, or there is a hardware fault, or it's a
SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows
then reboot into Windows twice. The usage of the /f parameter is very
important! If the device is a SoftRAID/FakeRAID then first activate
it and mount a different device under the /dev/mapper/ directory, (e.g.
/dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation
for more details.

I don't have a clue what it means where do I look for more?