VFS: Mounted root (ext2 filesystem) 
/boot/initrd.gz:  Loading kernel modules from initrd image: 
Using /lib/modules/2.6.17.13/reiserfs.ko
VFS: Cannot open device "<NULL>" or unknown-block(3,7)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(3,7)