lost /dev/hda6

["winglion" <winglion1 163 com>]

I install rh9 and konppix in my pc 
rh9 was in hda5 and knoppix hda6,both used just on partition!
It work fine for a few weeks! 
But when I boot into konppix ,it told me /dev/hda6 not found!
I mount and check hda6 in /mnt/test under rh9 ,and found it was clean!
then I get into /mnt/test/dev and found that the hda6 disappear! 
That's why I can't boot into knoppix!

Now I dont' know how to deal with this situation!What should I do?

   winglion
winglion1 163 com
 2003.4.30