VBox vm running ubuntu-22.04 host ubuntu-21.10

[hput]

OS: ubuntu-21.10

Couldn't think of a better subject line that was not too long. 

But what I am seeing seemed hard to convey in a few words.

Built Vbox VM running ubuntu-22.04.  It crashed for unknown reasons
some months later. . I'm not sure what brought it down just found it
not running a few days ago.

What is peculiar is that when I attempt to boot it.  It comes up with
the normal grub menu but after hitting enter there is a longish pause
and then it starts displaying the Xubuntu emblem with something spinning
indicating it's busy..

>From there it sits with the Xubuntu logo and a spinning something
... eternally.

I had nothing to do with Xubuntu so a bit floundered by there emblem
showning up.

How can I begin to correct the problem.  No ssh has yet been started
of course, so thats out.

I have the install media so, booted that and choose the `try ubuntu'
choice.

But what to do from there.

When it was working the Vbox vm was running zfs and had a 9 disk raidz2
pool setup.

What things can I do to the naked OS if I were to mount it from the
install media?

I'd like to recover the vm since I spent a good bit of time getting
it doing what I wanted done.