grub doesn't find the root disk

marco van der grient mw.vandergrient at
Thu May 4 12:49:36 PDT 2006

Thnx Alan!

Alan Lord wrote:
> marco van der grient wrote:
>> Hi,
>> For some reason the complete install went just fine (good job LFS!) 
>> but making the system bootable was a problem:
>> when I chroot into the system (from the live CD), call grub, I get 
>> errors about not finding the root disk (not a block device).
>> When I want to check the disk with fdisk or cfdisk, /dev/hdb It can 
>> not be find. When I logout the chroot envirioment fdisk or cfdisk does 
>> find the HD... A puzzel to me. Any thoughts or maybe concrete help on 
>> this?
>> Regards,
>> Marco
> Hi,
> Before you re-enter chroot you need to carry out the previous commands 
> in the book to mount /dev and /proc (IIRC) and run /sbin/udevstart. If 
> you don't do these things, /dev is basically empty inside chroot...
> Go back through chapter 6 and see where the /dev and /proc (possibly 
> /sys too) are dealt with and repeat those commands before entering 
> chroot (using the revised chroot, not the earlier one)
> Al

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