[ovirt-users] Re: Details about bios and custom emulated machine values
On 27 Jan 2020, at 22:01, Gianluca Cecchi
<gianluca.cecchi(a)gmail.com> wrote:
Hello,
in oVirt 4.3.7 in "Edit VM" -> System -> Advanced parameters
I can choose
Bios Type:
Default
Q35 Chipset with Legacy BIOS
Q35 Chipset with UEFI BIOS
Q35 Chipset with SecureBoot
and
Custom Emulated Machine:
Use cluster default (pc-i440fx-rhel7.6.0)
...
q35
pc-q35-rhel7.3.0
pc-q35-rhel7.4.0
pc-q35-rhel7.5.0
pc-q35-rhel7.6.0
and I can apparently mix all possible values.
you can, but they won’t work:)
in 4.3 the whole q35 is tech preview, with bugs we’ve fixed in 4.4.
custom emulated machine is really just for the cases where you can troubleshoot by trying
a “similar enough” machine type. using a different chipset or type from different major
version will likely just fail on vm start.
Any deeper information about implications?
What is the "Default" value for Bios Type?
i440fx with seabios(Legacy BIOS)
Did anything change in 4.3.8 (eg official support for q35)?
no, only in 4.4 where q35/seabios becomes the new default for new 4.4 clusters
I search also through official docs for RHV 4.3 (virtual mgmt guide, appendix A), but for
example I don't find any reference to the "Bios Type" parameter and a vague
reference to the "Custom Emulated Machine". Is there any more detailed link?
there should be a bit more about bios, since it’s becoming a default, but don’t ahve it in
front of me/at hand at the moment, sorry
Thanks,
michal
Thanks,
Gianluca
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