[Buildroot] Is grub-bios-setup the way to go to make a bootable CF?
Lennart Ramberg
ramberg.lennart at gmail.com
Mon Jun 30 19:53:32 UTC 2014
Hi Thomas,
On Mon, Jun 30, 2014 at 11:49 AM, Thomas Petazzoni <
thomas.petazzoni at free-electrons.com> wrote:
> Dear Lennart Ramberg,
>
> On Mon, 30 Jun 2014 10:23:06 +0200, Lennart Ramberg wrote:
>
> > Thank you Thomas,
> >
> > It helped to use sudo :-)
> > to get rid of that annoying
> > "cannot open `/boot/grub/device.map': No such file or directory."
> >
> > Now, putting the thus created CF in the target system brings me (only)
> to:
> > grub>
> >
> > Should I expect to automatically have come further?
>
> Yes, it should show the menu thanks to the configuration file. What
> exact steps have you followed to put the root filesystem and Grub on
> your Compact Flash?
>
>
>
Below I detail out what I did.
I also attach my .config (dotconfig) that resulted from my actions
described below.
I hope the below could be of use.
Regards
Lennart
On my host, LinuxMint16 dmesg tells me that my 1 GB CF (in a USB-CF
adapter) is /dev/sdc.
lennart at OptiPlex ~/buildroot-2014.05 $ sudo dd if=/dev/zero of=/dev/sdc
bs=1M count=32
lennart at OptiPlex ~/buildroot-2014.05 $ sudo fdisk /dev/sdc
(n, p, 1, 2048, 2001887, a, 1, w)
lennart at OptiPlex ~/buildroot-2014.05 $ sudo partprobe /dev/sdc
-------------------------------------------------------------
Thus:
lennart at OptiPlex ~ $ sudo fdisk /dev/sdc
Command (m for help): p
Disk /dev/sdc: 1024 MB, 1024966656 bytes
1 heads, 32 sectors/track, 62559 cylinders, total 2001888 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xae6de628
Device Boot Start End Blocks Id System
/dev/sdc1 * 2048 2001887 999920 83 Linux
Command (m for help): q
-------------------------------------------------------------
lennart at OptiPlex ~/buildroot-2014.05 $ sudo umount /dev/sdc1
lennart at OptiPlex ~/buildroot-2014.05 $ sudo mkfs.ext3 -L root /dev/sdc1
lennart at OptiPlex ~/buildroot-2014.05 $ sudo mount /dev/sdc1 /mnt
lennart at OptiPlex ~/buildroot-2014.05 $ make distclean
lennart at OptiPlex ~/buildroot-2014.05 $ make menuconfig
Defaults, except as follows:
Target options:
Target Architecture (i386), Target Architecture Variant: i686
Build options:
[*] Enable compiler cache
Toolchain:
C library, (X) glibc
System configuration:
[ ] Run a getty (login prompt) after boot
Kernel:
[*] Linux Kernel
Kernel version (3.14.4)
(i386) Defconfig name
[*] Install kernel image to /boot in target
Target packages:
Graphic libraries and applications (graphic/text):
[*] X.org X Window System
Libraries:
Database: [*] sqlite
Graphics: [*] cairo: [*] png support
[*] jpeg support
Networking: [*] libcurl
Text editors and viewers:
[*] nano
[ ] optimize for size
Filesystem images:
[*] ext2/3/4 root filesystem: ext2/3/4 variant (ext3)
(1000000) size in blocks (leave at 0 for auto calculation)
[*] initial RAM filesystem linked into linux kernel
Bootloaders:
[*] grub2
< Save >
...
lennart at OptiPlex ~/buildroot-2014.05 $ make
lennart at OptiPlex ~/buildroot-2014.05 $ sudo tar -C /mnt -xf
output/images/rootfs.tar
lennart at OptiPlex ~/buildroot-2014.05 $ sudo umount /mnt
lennart at OptiPlex ~/buildroot-2014.05 $ sudo
./output/host/usr/sbin/grub-bios-setup -b
./output/host/usr/lib/grub/i386-pc/boot.img -c ./output/images/grub.img -d
. /dev/sdc -v
...
./output/host/usr/sbin/grub-bios-setup: info: Scanning for dmraid_nv
devices on disk hostdisk//dev/sda.
./output/host/usr/sbin/grub-bios-setup: info: Scanning for ldm devices on
disk hostdisk//dev/sda.
./output/host/usr/sbin/grub-bios-setup: info: scanning hostdisk//dev/sda
for LDM.
./output/host/usr/sbin/grub-bios-setup: info: no LDM signature found.
./output/host/usr/sbin/grub-bios-setup: info: Scanning for lvm devices on
disk hostdisk//dev/sda.
./output/host/usr/sbin/grub-bios-setup: info: no LVM signature found.
./output/host/usr/sbin/grub-bios-setup: info: Scanning for DISKFILTER
devices on disk hostdisk//dev/sda.
./output/host/usr/sbin/grub-bios-setup: info: Scanning for mdraid1x devices
on disk hostdisk//dev/sda.
./output/host/usr/sbin/grub-bios-setup: info: Scanning for mdraid09 devices
on disk hostdisk//dev/sda.
./output/host/usr/sbin/grub-bios-setup: info: Scanning for mdraid09_be
devices on disk hostdisk//dev/sda.
./output/host/usr/sbin/grub-bios-setup: info: Scanning for dmraid_nv
devices on disk hostdisk//dev/sda.
./output/host/usr/sbin/grub-bios-setup: info: Scanning for ldm devices on
disk hostdisk//dev/sda.
./output/host/usr/sbin/grub-bios-setup: info: scanning hostdisk//dev/sda
for LDM.
./output/host/usr/sbin/grub-bios-setup: info: no LDM signature found.
./output/host/usr/sbin/grub-bios-setup: info: Scanning for lvm devices on
disk hostdisk//dev/sda.
./output/host/usr/sbin/grub-bios-setup: info: no LVM signature found.
./output/host/usr/sbin/grub-bios-setup: info: Partition 0 starts from 2048.
./output/host/usr/sbin/grub-bios-setup: info: Partition 4 starts from
480159744.
./output/host/usr/sbin/grub-bios-setup: info: Partition 5 starts from
116279296.
./output/host/usr/sbin/grub-bios-setup: info: the size of hostdisk//dev/sda
is 488281250.
./output/host/usr/sbin/grub-bios-setup: info: guessed root_dev
`hostdisk//dev/sda' from dir `.'.
./output/host/usr/sbin/grub-bios-setup: info: setting the root device to
`hostdisk//dev/sda,msdos6'.
./output/host/usr/sbin/grub-bios-setup: info: the first sector is <1,0,512>.
./output/host/usr/sbin/grub-bios-setup: info: saving <2,0,512>.
./output/host/usr/sbin/grub-bios-setup: info: saving <3,0,512>.
./output/host/usr/sbin/grub-bios-setup: info: saving <4,0,512>.
...
./output/host/usr/sbin/grub-bios-setup: info: saving <470,0,512>.
./output/host/usr/sbin/grub-bios-setup: info: saving <471,0,512>.
./output/host/usr/sbin/grub-bios-setup: info: saving <472,0,512>.
./output/host/usr/sbin/grub-bios-setup: info: saving <473,0,512>.
./output/host/usr/sbin/grub-bios-setup: info: saving <474,0,512>.
lennart at OptiPlex ~/buildroot-2014.05 $
Ready to test. Rebooted my PC with CF still in place gives just:
GNU GRUB version 2.00
blablabla
grub>
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