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

[Gerd Hoffmann]

  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.

cheers,
  Gerd