求助！linux进不去

我原来在Windows下机子突然断电。。然后lunux windows 都进不去了。。我在网上看，，说是要重新装grub。。
grub> root(hdo, )
possible partitions are:
partition num:0,Filesystem type is fat,partition type 0xe
partition num:2,Filesystem type is fat,partition type 0xe
partition num:4,Filesystem type unkown,partition type 0x7
partition num:5,Filesystem type is fat,partition type 0xb
partition num:6,Filesystem type is ext2fs,partition type 0x83
partition num:7,Filesystem type unkownb,partition type 0x8e
partition num:8,Filesystem type is fat,partition type 0xb
然后我就装在(hd0,6)上了。。因为其它都装不上。。然后就成功了。。重启还是进不去linux，windows能进去了。。
显示下面的。。。怎么办？？只有重装吗？？。高手给小第看看！！谢谢！！！

Booting 'Fodora (2.6.21.3194.fc7)'
root(hd0,7)
Filesystem type unknown,partition type 0x8e
ernel /vmlinu2-2.6.21-1.3194.fc7 ro root=/dev/volGroup00/LogVol00 rhub quiet
Error17:Cannor mount selected partition
Press ang key to continue...