Re: Failure to boot CDROM with -drive arg

[Anthony Liguori <anthony@codemonkey.ws>]

Laurent Vivier wrote:
> Le mardi 08 juillet 2008 à 09:59 -0500, Anthony Liguori a écrit :
>   
>> Laurent Vivier wrote:
>>     
>>> So, "boot=on" means in fact "bootable=true"
>>>   
>>>       
>> I guess.  I don't know that the later is more clear.  I think the source 
>> of the confusion is the entire concept of "first bootable harddisk" 
>> which is what -boot c really means.
>>
>> FWIW, the reason media=cdrom,boot=on doesn't work, is that a CDROM's 
>> boot record is in el torito format instead of the traditional BIOS boot 
>> sector.
>>
>> media=cdrom,boot=on would work if the image was a disk image instead of 
>> an ISO.
>>
>> In fact, I'm inclined to think that media=cdrom,boot=on should not be 
>> explicitly prohibited because of this fact.
>>     
>
> To simplify, I think qemu should ignore "boot=on" when "if=ide".
>   

It's necessary to boot from anything other than hda.  For instance:

qemu-system-x86_64 -hda foo.img -drive file=boo.img,if=ide,boot=on -boot c

Regards,

Anthony Liguori

> Laurent
>