Re: [libvirt] [PATCH] qemu: use "ide" as device name for implicit SATA controller on Q35
Hi,
1) Every SATA controller has 6 buses, and each bus allows a single
target (or "unit").
That is how it is modeled in qemu, largely due to reusing the ide code.
On real hardware you have a sata controller with a number of ports
(happens to be 6 for the one emulated by qemu, but that may be different
on other controllers). You can plug a single device into each port.
There is not really a concept of a sata bus.
(or are we just stuck with the current state of unit being
interpreted
as bus for sata addresses? :-/)
I'd say continuing using 'unit' is fine. When changing the way the
address is specified in xml I'd rather go for something like this:
<address type=sata controller=0 port=2 />
cheers,
Gerd