[vfio-users] Using a physical disk in QEMU

[Torbjorn Jansson]

On 2017-10-22 02:18, Taiidan at gmx.com wrote:
> Another option that would provide the best performance is attaching the drive 
> to a SR-IOV capable HBA's VF and then using VFIO to attach the VF to your VM.
> 
> The LSI SAS 2308 series is the most affordable choice for this at around $50-70 
> for an 8 internal port adapter (which can support up to 256 drives via expander 
> cards)
> 

a little off-topic for this thread but i'm curious how do sr-iov work on raid 
controllers?
do you assign drives or volumes via controller software that then shows up as 
VFs? and that VF i assume appears like a disk by itself so vm don't need to 
know much about it.

i mean, not all drives/volumes can show up as VF since i bet host need some 
drives to boot from too, right?