Re: [Qemu-devel] [PATCH v2] ahci: add -drive support

[Markus Armbruster]

Gerd Hoffmann <address@hidden> writes:

>   Hi,
>
>> What I'd like to avoid is casual users setting up new guests with our
>> shiny new q35 board getting their IDE drives connected to some slow, old
>> controller just because they haven't discovered that if=ide doesn't cut
>> it anymore, and they need to use if=ahci now.
>
> That will not work.  ahci has no such thing as master/slave.  Each ahci
> port (modeled as ide bus in qemu for ata emulation code reuse reasons)
> accepts one drive only.
>
> Thus -drive if=ide,bus=x,unit=1,file=... will not work with ahci.

I see. To be precise: the part that doesn't work is unit=N with N>0.