Slight OT: How to run existing FreeBSD on windows as a VM

Aryeh Friedman aryeh.friedman at
Wed Feb 17 21:55:35 UTC 2021

Top posting since the following summarizes the entire reply:  I already
looked into vbox for this and all require modification to the existing
install and thus are no goes (both have to remain independently bootable as
the bare metal OS).

On Wed, Feb 17, 2021 at 4:05 PM David Christensen <dpchrist at>

> On 2021-02-17 00:21, Aryeh Friedman wrote:
> > I have two SSD's one that has FreeBSD installed on it and one that has
> > WIndows 10 on it.
> >
> > I want to run the windows SSD as a VM on FreeBSD and the FreeBSD on
> windows
> > as a VM.   How can I do this without having to reinstall either one.  I
> am
> > pretty sure how to do the first case since I have played with bhyve quiet
> > extensively including doing by hand windows VM's on it and am pretty sure
> > all I have to do is point bhyve to the right /dev node (I have done this
> > before with raw disks for FreeBSD but not windows).
> >
> > I am completely unfamiliar with how to do VM's on windows though and
> except
> > for knowing there are hypervisors for it am completely clueless about how
> > to do that end.
> If you want to convert the FreeBSD disk to a VirtualBox image file --
> e.g. two FreeBSD machines that diverge when operated -- I would try the
> VBoxManage 'convertfromraw' command:
> If you want to run the FreeBSD drive inside VirtualBox on Windows --
> e.g. one machine that can be operated in one of two ways but retain its
> identity -- I would try "raw hard disk access":
> In either case, you may need to adjust rc.conf(5) to deal with network
> drivers and/or settings.
> David
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Aryeh M. Friedman, Lead Developer,

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