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  • All news regarding Xen and XCP-ng ecosystem

    143 Topics
    4k Posts
    A
    @stormi I'm also getting error on some VMs while trying to export a disk and also trying to even start some VMs from NFS (that were fine before). xo-server[565]: 2026-05-13T02:53:15.746Z xo:api WARN admin | vm.start(...) [2s] =!> XapiError: INTERNAL_ERROR(xenopsd internal error: Storage_error ([S(Illegal_transition);[[S(Activated);S(RO)];[S(Activated);S(RW)]]])) xo-server[565]: 2026-05-13T02:53:40.652Z xo:api WARN admin | vm.start(...) [3s] =!> XapiError: SR_BACKEND_FAILURE_46(, The VDI is not available [opterr=VDI 399734eb-5965-4799-ac36-f6dd774db867 not detached cleanly], )

  • Everything related to the virtualization platform

    1k Topics
    15k Posts
    johnnezeroJ
    WHAT: This post is dedicated to preserving the valuable "Server Admin Guide" content produced by @tjkreidl, originally titled "A Tale of Two Servers." These articles were first published in 2019 on the Citrix Blogs, which are unfortunately no longer available. KUDOS: Special thanks to @john.c for performing some incredible web sleuthing to recover this content, and to @tjkreidl for creating these essential guides in the first place — as well as for "Breathing Life" back into them by highlighting their importance before they disappeared forever into the ferocious "Bit-Bucket." Series Overview & Quick Reference If you're looking for a high-level summary of the concepts covered in this series — including specific XCP-ng/XO commands for BIOS power management, GPU scheduling, and NUMA inspection — start here: Quick Reference & Summary Guide The Complete Series (Markdown & PDF) Part 1: How BIOS Settings Can Affect Your Apps and GPU Performance: A deep dive into CPU Power Management (OS DBPM vs. System DBPM) and Turbo mode. Read Markdown Version Download PDF Archive Part 2: GPU Settings and Advanced BIOS Tuning Exploring Uncore frequency, C1E states, and NVIDIA GPU Scheduler modes (Best Effort vs. Equal Share). Read Markdown Version Download PDF Archive Part 3: NUMA, CPUs, Sockets/Cores, and VM Performance Understanding vNUMA, vCPU oversubscription, and the importance of VM startup order for optimal memory placement. Read Markdown Version Download PDF Archive Archived for the XCP-ng community. Questions or additional insights? Please discuss below!

  • All Xen Orchestra related questions/reports

    3k Topics
    28k Posts
    tjkreidlT
    @john.c @johnnezero Well, the Github reporsitory is in place already! Access it at: https://github.com/tobiaskreidl/Citrix-Tobias-Kreidl-Collection Feel free to find more material to add, as will I, and thank you kindly for the suggestions and support.

  • Our hyperconverged storage solution

    47 Topics
    745 Posts
    J
    @Mathieu-L linstor n l was included in my original post. All nodes were updated to May 2026 Security and Maintenance Updates for XCP-ng 8.3 LTS, all nodes were restarted. May 2026 Updates #2 for XCP-ng 8.3 LTS was released, and a couple days later I installed on all hosts. No host restarted. When xen04 was restarted, that is when this issue happened. I had used systemctl restart linstor-controller here (https://xcp-ng.org/forum/post/105309) to restart the controller.

  • Non-English speakers

    35 Topics
    113 Posts
    olivierlambertO
    Ah excellente nouvelle Je passe le sujet en résolu !