installed gentoo and went to reboot and got error 17: cannot mount selected partition
 

I just installed gentoo linux and i got to the reboot part. I rebooted and the grub loader came and this is what it looked like



Booting 'Gentoo Linux 2.6.11-r9'

root (hd0,0)
Filesystem type unknown, partiontion type 0x82
kernel /kernel-2.6.11-gentoo-r9 root=dev/hda2

Error 17: cannot mount selected partition

Press any key to continue...

Is this just a typo:
kernel /kernel-2.6.11-gentoo-r9 root=dev/hda2

If this is in your actual grub.conf you should change it to:
kernel /kernel-2.6.11-gentoo-r9 root=/dev/hda2

note the '/' before dev