Lars Bamberger wrote: > ell sam wrote: > >> I am having trouble booting from the kernel on my hd to load Linux from >> my usb hd. I have installed everything and it works using the internal >> hd kernel booting from grub passing the root=/dev/sdb6 to the kernel. >> > > I take it, you want to boot the kernel stored on you hd and have it use > another portable device as your root filesystem. > > >> I have tries root=UUID=<my >> uuid numbers...> and root=LABEL=LFS and root=/dev/disk/by-uuid/<my >> uuid...> and root=/dev/disk/by-label/LFS all don't work. >> > > I guess you are referring to the 'root=' kernel-parameter (and NOT the > grub parameter). That's important, because sometimes grub's and the > kernels naming scheme don't match. On one of my systems, (hd0) is > /dev/sdb at boottime and at runtime (hd1) is /dev/sdb. That caused some > confusion. > > So, first make sure that your grub setup does exactly what you want it > to. Be explicit in your grub configuration. > > Example menue.lst: > root (hd0,0) <-- grub's root parameter > kernel (hd0,1)/linux-2.6.28.1 root=/dev/sdb1 <-- the kernel's root parameter > > In either case, the kernel knows nothing about anything else than the > standard device names. (See <kernel-source>/Documentation/devices.txt) > Make sure your kernel supports whatever device you'd like to use as root > filesystem and take a look at > <kernel-source>/Documentation/kernel-parameters.txt. You might want to > experiment with additional kernel parameters like 'rootwait' or 'rootdelay'. > > >> Or maybe in initramfs etc.. >> > > I'd figure that you need an initramfs only if he kernel is unable to > detect the device your root filesystem is on. > > HTH > Lars > > yes I have the kernel on my hd (hd0,5) and want the kernel to load the lfs system from external drive currently /dev/sdb6 and it works that way. my menu.lst in grub sets root as (hd0,5) and boots kernel with "root=/dev/sdb6" and lfs loads that way. The problem is if I add a drive /dev/sdb6 becomes /dev/sdc6 etc... so i want to change "root=/dev/sdb6" to "root=LABEL=LFS" or UUID.
I think the way to go is fix initramfs -- http://linuxfromscratch.org/mailman/listinfo/blfs-support FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page
