Re: [Qemu-devel] Re: Boot Failure (CDROM boot failure code : 0004)

[Anthony Liguori <anthony@codemonkey.ws>]

Volkan YAZICI wrote:
> On Mon, 16 Jun 2008, Laurent Vivier <Laurent.Vivier@bull.net> writes:
>   
>> could you burn a CD with your .iso and try to boot a real PC ?
>>     
>
> I created the ISO image from the same CD that's inserted into the
> /dev/scd0 using below command:
>
>   root:~# dd bs=$[1024 * 32] \
>   > if=/dev/scd0 \
>   > of=/root/windows-server-2003-standard-x86-64-sp2.iso
>   

Your dd line is very suspect.  Why are you using a block size of 32k?  
The sector size of most CD-ROMs is 2k.  I've certainly encountered my 
fair share of CD-ROMS that were an odd multiple of 2k.  dd will silently 
truncate the ISO if the size is not a multiple of 32k.

Regards,

Anthony Liguori

> And I'm sure CD is bootable. (Not pirated, original.) OTOH, if we'd
> assume the ISO image is corrupted for some unknown reason, why "-cdrom
> /dev/scd0" didn't work?
>
>
> Regards.
>
>
>