Re: OVMF, lvm devices, and hvm guests

[T <bobs%thelibertytree.org@localhost>]

On Tue, 04 Oct 2022 14:43:15 -0400, Brad Spencer wrote:
> I tried a LOT of different combinations.  Among the ones that did not
> work were these:
> 
> disk = [ 'phy:/dev/mapper/rnotraidvg-tclv0,ioemu:hda,w' ]
> disk = [ '/dev/mapper/rssdvg0-boottest,raw,hda,rw' ]
> 
> 
> I never tried using the 'sdX' device, always a 'hdX' device.  I will
> attempt using a 'sdX' device when I have a chance.

https://xenbits.xen.org/docs/unstable/man/xen-vbd-interface.7.html
There have been a few times where using a specific vdev has caused me 
issues when upgrading between different versions of Xen. At one point, I 
was using 'xvdX' with an HVM which seemed to work, but stopped working 
after upgrading, so I had to change it to 'sdX'. I believe the uDom 
operating system also plays a role, for example, if trying to use an old 
OS, the 'hdX' might need to be used, but using that vdev with some 
current OS versions will cause problems, it did for me when trying to 
load one of the other BSDs.