XCP-ng
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Register
    • Login

    Windows 2025 Standard 24H2.11 (iso release of sept 25) crash on reboot with "INACCESSIBLE BOOT DEVICE 0x7B" in XCP 8.2.1 and XCP 8.3

    Scheduled Pinned Locked Moved XCP-ng
    26 Posts 7 Posters 478 Views 6 Watching
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • F Offline
      flakpyro @dinhngtu
      last edited by

      @dinhngtu Very strange! I wonder why installing from an older ISO and then installing all the updates has no issues at all? Im relieved to know that our current 2025 VMs wont stop working after a reboot!

      D 1 Reply Last reply Reply Quote 1
      • A Online
        acebmxer
        last edited by

        In my testing

        SW_DVD9_Win_Server_STD_CORE_2025_24H2.2_64Bit_English_DC_STD_MLF_X23-91027.iso works and boots to prompt to create Admin password.

        SW_DVD9_Win_Server_STD_CORE_2025_24H2.11_64Bit_English_DC_STD_MLF_X24-14362.iso will crash after a restart or two but never prompts to create admin password.

        1 Reply Last reply Reply Quote 0
        • D Offline
          dinhngtu Vates 🪐 XCP-ng Team @flakpyro
          last edited by

          @flakpyro It might be related to the boot-initialization logic of the NVMe driver. If that hypothesis is correct, then uninstalling Xen tools will give you the same problem once the emulated NVMe reappears.

          F F 2 Replies Last reply Reply Quote 0
          • F Offline
            francesco-maria @dinhngtu
            last edited by

            @dinhngtu on my machine there isn't any xen tools installed because was freshly installed and the system doesn't end the first boot. it execute the windows partitioning and file copy, then crash at first boot of the installed system.

            A 1 Reply Last reply Reply Quote 0
            • A Online
              acebmxer @francesco-maria
              last edited by

              @dinhngtu same mine where two fresh VMs fresh install of server 2025. Older iso works newer iso does not. For me the newer iso the system rebooted 2 maybe 3 times then crashed to a hard power off of the vm.

              Again no xen tools installed as os never finished installing on a fresh vm. no OS upgrade.

              1 Reply Last reply Reply Quote 1
              • F Offline
                flakpyro @dinhngtu
                last edited by

                @dinhngtu Well that is slightly concerning! Ill be sure to not remove Xen Tools on any of these VMs until we can get this resolved. We have a handful of production server 2025 VMs that im now slightly worried about! I should note that last week we did update them to version 9.4.2 of the tools, which tends to require 2 reboots to fully install and we didn't run into any issues.

                1 Reply Last reply Reply Quote 0
                • D Offline
                  dinhngtu Vates 🪐 XCP-ng Team
                  last edited by

                  I've narrowed down the problem to a set of patches. Will continue to diagnose.

                  1 Reply Last reply Reply Quote 1
                  • A Online
                    acebmxer
                    last edited by acebmxer

                    Just tested Win 11 25H2 iso just released today. No issues with fresh install.

                    Management tools installed and Citrix PV drivers installed via windows update.

                    Screenshot 2025-09-30 150512.png

                    P 1 Reply Last reply Reply Quote 0
                    • P Offline
                      Pilow @acebmxer
                      last edited by

                      @acebmxer did you test latest Xen Tools ?

                      dd2498da-63f0-4206-8b8a-903a57b6506c-image.png

                      https://www.xenserver.com/downloads#lightbox-20160
                      151beb48-cea8-435a-9194-96bfdb805e62-image.png
                      7 days old though

                      A 1 Reply Last reply Reply Quote 0
                      • A Online
                        acebmxer @Pilow
                        last edited by

                        @Pilow

                        Did dirty upgrade left all boxes checked and vm is setup to update drivers via windows update....

                        Screenshot 2025-09-30 151025.png

                        I have rebooted vm and restarts no issues.

                        Screenshot 2025-09-30 151319.png

                        1 Reply Last reply Reply Quote 1
                        • D Offline
                          dinhngtu Vates 🪐 XCP-ng Team
                          last edited by

                          The cause has been found, and a fix is under way. Stay tuned.

                          F 1 Reply Last reply Reply Quote 1
                          • F Offline
                            flakpyro @dinhngtu
                            last edited by

                            @dinhngtu Thats great news!

                            1 Reply Last reply Reply Quote 0
                            • D Offline
                              dinhngtu Vates 🪐 XCP-ng Team
                              last edited by dinhngtu

                              Hi all, here's a pre-build of the fix for anyone who wants to test (8.3 only):

                              wget https://koji.xcp-ng.org/repos/user/8/8.3/xcpng-users.repo -O /etc/yum.repos.d/xcpng-users.repo
                              yum update --enablerepo=v8.3-u-ndinh1
                              
                              F A 2 Replies Last reply Reply Quote 2
                              • F Offline
                                francesco-maria @dinhngtu
                                last edited by

                                @dinhngtu will be released also for 8.2.1?

                                1 Reply Last reply Reply Quote 0
                                • olivierlambertO Online
                                  olivierlambert Vates 🪐 Co-Founder CEO
                                  last edited by

                                  8.2.1 is EOL: https://xcp-ng.org/blog/2025/09/16/xcp-ng-8-2-lts-reached-its-end-of-life/

                                  F 1 Reply Last reply Reply Quote 0
                                  • A Offline
                                    Andrew Top contributor @dinhngtu
                                    last edited by

                                    @dinhngtu On a quick test, the ISO boots and installs. When the VM boots from the HD it crashes (and on reboots).

                                    Updating XCP 8.3 with qemu-4.2.1-5.2.12.2~fixvwc1.1.xcpng8.3.x86_64 solves the issue and the installed windows image boots correctly without any additional changes.

                                    1 Reply Last reply Reply Quote 3
                                    • olivierlambertO Online
                                      olivierlambert Vates 🪐 Co-Founder CEO
                                      last edited by

                                      That's great! \o/

                                      1 Reply Last reply Reply Quote 0
                                      • F Offline
                                        francesco-maria @olivierlambert
                                        last edited by

                                        @olivierlambert this problem can cause a crash on update of windows 2025 VM on xcp-ng 8.2.1 or remains only a problem for fresh install?

                                        D 1 Reply Last reply Reply Quote 0
                                        • olivierlambertO Online
                                          olivierlambert Vates 🪐 Co-Founder CEO
                                          last edited by

                                          8.2 is EOL, and also IDK how it's affected by this issue.

                                          1 Reply Last reply Reply Quote 0
                                          • D Offline
                                            dinhngtu Vates 🪐 XCP-ng Team @francesco-maria
                                            last edited by

                                            @francesco-maria I haven't determined what exact conditions would trigger the issue. It seems to only happen on new installations for now, but it could very well change in the future. Though as long as you keep the Xen drivers installed, things should be OK.

                                            F 1 Reply Last reply Reply Quote 1
                                            • First post
                                              Last post