[Qemu-devel] diskimage HOWTO

[Bai Shuwei]

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 

   buildroot-2009.05/docs/README.diskimage, 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
 

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