Join Log in
Score:0
avatar Server

QEMU - after dist-upgrade of Debian host, win10 guest state lost

in flag
zenlord

I'm running a headless Debian host with a win10 guest that I seldomly login to via vnc. Last week I upgraded Debian from Buster to Bullseye, and that also upgraded QEMU from v3.1 to v5.2 (and libvirt jumped from 5.0 to 7.0). Of course, my due diligence checklist did not include making a snapshot from the guest. When I now login to the system, I'm greeted by the Windows installer.

I know my way around Debian, but am fairly new to QEMU/Libvirt - any pointers how to try and restore the state of my guest OS? Reinstalling is not that big of a deal, but we live to learn :).

This is the install command I used:

virt-install
--name Win10
--ram 2048
--cpu host
--hvm
--vcpus 2
--os-type windows
--os-variant win10
--disk /var/lib/libvirt/images/win10.qcow2,size=30,bus=virtio
--disk /var/lib/libvirt/boot/Win10_2004_English_x64.iso,device=cdrom,bus=sata
--disk /var/lib/libvirt/boot/virtio-win-0.1.171.iso,device=cdrom,bus=sata
--boot cdrom
--network bridge=br0
--graphics vnc,listen=0.0.0.0,port=5901
--noautoconsole
--check all=off

/EDIT: To clarify: I'm hoping to restore the state of my guest OS to the state it was in before the dist-upgrade. Maybe I need to rely on a filesystem backup (which I have), or maybe I need to update the qemu/libvirt configuration?

39
0 + 0
djdomi avatar
za flag
djdomi
and what is the question or equal issue now? i could not figure it out ;)
0
Reply
in flag
zenlord
Hi @djdomi - thx for your attention :). I'm hoping to restore the state of my guest OS to the state it was in before the dist-upgrade. Maybe I need to rely on a filesystem backup (which I have), or maybe I need to update the qemu/libvirt configuration?
0
Reply
djdomi avatar
za flag
djdomi
but why do you mount the iso for setup while yoz already installed the windows? and i think boot cdrom should be replaced by hd
0
Reply
Score:1
avatar Server
br flag
Simon Richter

If I remember correctly, the boot order mechanism changed, so specifying --boot cdrom will now remove all but the CD-ROM from the list of bootable media, instead of just affecting ordering.

This might be as simple as adding a ,hd at the end there, or replacing cdrom by hd.

0 + 0
in flag
zenlord
Thank you - I already suspected that the state would not be lost, but just hidden by a change in configuration parameters. But looking through the changelogs going from v3.1 to 5.2 left a lot of possible options. replacing 'cdrom' by 'hd' did the trick!
0
Reply
ธงชาติไทย
Elon Musk
I sit in a Tesla and translated this thread with Ai:

mangohost

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.