[Buildroot] diskimage HOWTO

Bai Shuwei baishuwei at gmail.com
Mon Aug 24 05:39:53 UTC 2009

Hi, All:
  I want to build a test enviroment with QEMU and buildroot. But I don't
know how to build the diskimage which same as linux-0.2.img offered by
BUILD-ROOT. I build the diskimage following the
but failure.

   The bellow is my process.

   # dd if=/dev/zero of=img bs=4096 count=16384
   # echo -e "n\np\n1\n\nw\n" | fdisk -C 16065 -H 255 -S 63 ./img
   # losetup -o 512 /dev/loop0 img
   # mkfs.ext2 -m0 -Lslash /dev/loop0
   # mount -oloop,rw /dev/loop0 fs/
   # cp -a ../root/* fs/
..root is the filesystem built by BUILD-ROOT and the bzImage has been copied
into root/boot/, grub.lst has been created too.
  # umount fs/
  # losetup -d /dev/loop0
  # losetup /dev/loop0 img
  # grub --device-map=/dev/null
grub> device (hd0) img
device (hd0) img
grub> geometry (hd0) 16065 255 63
geometry (hd0) 16065 255 63
drive 0x80: C/H/S = 16065/255/63, The number of sectors = 258084225, img
   Partition num: 0,  Filesystem type unknown, partition type 0x83
grub> root (hd0,0)
root (hd0,0)
 Filesystem type unknown, partition type 0x83
grub> setup (hd0)
setup (hd0)

*Error 17: Cannot mount selected partition*
I don't know why it is error. Gald if you can help or give me some document
on it.

Best Regards!

Bai SHuwei

Love other people, as same as love yourself!
Don't think all the time, do it by your hands!

Personal URL: http://dslab.lzu.edu.cn:8080/members/baishw/
E-Mail: baishuwei at gmail.com or baishuwei at dslab.lzu.edu.cn
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