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Grub unable to find root device

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linux-howto

http://chakra-project.org – Looks like you are not using Chakra's grub to boot.If you do know that for example, it is Ubuntu's grub and it is still installed there, go to Ubuntu and at terminal, "sudo update-grub"   If you don't know, what OS is at the top of the menu?print out that grub's grub.cfg (or menu.lst)as well as fdisk -l and blkid (HowTos)