[Qemu-devel] problem with qemu-img to create boot disk

[kaiven long]

Hi,folks

     I am using QEMU to debug Linux Kernel. And a boot disk is create through qemu-img. It can cannot be booted with other built kernel. The process is as the following show:

    create disk image like this:

           qemu-img create -f raw rootdisk.img 8G

    install redhat EL4 U4:

           qemu -boot d -cdrom rhel4u4-disc1.img -hda rootdisk.img

    during installation:

           /dev/hda1 ---> /boot ext2

           /dev/hda2 ----->/       ext2

           /dev/hda3------>    swap

    after the installation, file rootdisk.img, it shows:

           rootdisk.img:      x86 boot sector, code offset 0x48

     it can work like this:

           qemu rootdisk.img

     enter the system:fdisk -l, it shows that

         Partition table entries are not in disk order

 

     it also panics with other new built kernel like:

      qemu -kernel bzImage -hda rootdisk.img

     but the same kernel can work with the disk image down from qemu's website:

      qemu -kernel bzImage -hda linux-0.2.img

      The only difference between rootdisk.img and linux-0.2.img is their file atrributes as the following:

       rootdisk.img:      x86 boot sector, code offset 0x48

       linux-0.2.img:      x86 boot sector

      

       pls help check the above process. I will appreciate that anyone points the potential errors.

      thank you~

 

best wishes,

kaiven