| View previous topic :: View next topic |
| Author |
Message |
3xkrazy
n00b
Joined: 27 Nov 2012
Posts: 8
|
 Posted: Tue Nov 27, 2012 2:45 am Post subject: How do we mount a non-standard root point during boot? |
 |
|
Hello Community,
I currently have a nomulitlib profile set up running perfectly with a disk layout as described below:
| Code: | #/etc/fstab amd64
/dev/sda3 / ext4 noatime 0 1
/dev/sda1 /boot ext2 noauto,noatime 0 2
/dev/sda4 /home ext4 noatime 0 1
/dev/sda2 none swap sw 0 0 |
I would like to boot from my x86 system that I compiled on /dev/sda4 partion (built on my nomultilib profile while chrooted; Root is at /home/gentoo32 ). The 32 bit kernel and initramfs were then copied to my boot partition (/dev/sda1). I did not install grub (grub-install) while chrooted in the 32bit environment. Its fstab looks like this:
| Code: |
#/etc/fstab x64
/dev/sda1 /boot ext2 noauto,noatime 0 2
/dev/sda4 /gentoo32 ext4 noatime 0 1
/dev/sda2 none swap sw 0 0
|
My grub.conf (from /dev/sda1) looks like this:
| Code: |
default 0
timeout 10
title Gentoo Linux 3.5.7 amd64
root (hd0,0)
kernel /boot/kernel-3.5.7-gentoo64 rootfstype=ext4 real_root=/dev/sda3
initrd /boot/initramfs-genkernel-x86_64-3.5.7-gentoo
title Gentoo Linux 3.5.7 x86
root (hd0,0)
kernel /boot/kernel-3.5.7-gentoo32 rootfstype=ext4 real_root=/dev/sda4
initrd /boot/initramfs-genkernel-x86-3.5.7-gentoo
|
The 32 bit kernel boots, but it complains that my root partition is not a valid. Does anyone know what I did wrong and how I mount gentoo32 as root sucessfully?
Thanks! |
|
| Back to top |
|
 |
3xkrazy
n00b
Joined: 27 Nov 2012
Posts: 8
|
| Posted: Tue Nov 27, 2012 3:18 am Post subject: |
|
|
| Quote: | | I did not install grub (grub-install) while chrooted in the 32bit environment. |
I just wanted to add that I'm trying to boot the 32 bit kernel from /dev/sda1, which already has grub-static installed for my amd64 setup. |
|
| Back to top |
|
|
Hu
Moderator
Joined: 06 Mar 2007
Posts: 21595
|
| Posted: Tue Nov 27, 2012 11:18 pm Post subject: |
|
|
| When the kernel mounts root, the root of the filesystem becomes /. You could work around this with an initramfs that chroots into the effective root, but I do not understand why you even want to boot a 32-bit kernel. You have already demonstrated that your 64-bit kernel can run 32-bit code. Running the 32-bit environment in its chroot should be sufficient for any legacy x86 programs you need to run. |
|
| Back to top |
|
|
|
Installing Gentoo
