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After Upgrade

The Server stays in Maintenance Mode​

Causes and Solutions​

  • You enabled the maintenance mode and forgot about it.
    • No big deal, just exit maintenance mode :-)
  • The server is still booting.
    • Take your time and let it boot up :-) this sometimes takes a while, but typically not longer than some minutes.
  • A Storage Repository (SR) could not be attached.
    • Check the corresponding disk(s), network(s) and setting(s). Follow the 3-Step-Guide.
  • There is a serious problem.
    • Follow the 3-Step-Guide.

Some of my VMs do not start​

With the following error: "This operation cannot be performed because the specified virtual disk could not be found."

Cause​

It's mostly related to an inserted ISO that is no longer accessible.

Solution​

Eject the ISO on those VMs.

Missing scripts/tools after upgrade​

Cause​

XCP-ng ISO upgrade is a reinstall that saves only your XAPI database (Settings/VM Metadata). But it also creates a full backup of your previous XCP-ng/XenServer installation on a second partition, in most cases it's /dev/sda2.

Solution​

To access the backup (with all your tools and modifications) just mount the backup partition (mostly /dev/sda2) and copy your data back.

After upgrading my XCP-ng host is unstable, network card freezes, kernel errors, etc.​

Causes and Solutions​

  • Maybe your hardware got an issue
    • Check caps on your mainboard
    • Check power supply
    • Check cables
    • Check drives SMART values with something like smartctl -A /dev/sda (Smartmontools)
    • Check memory with something like Memtest86+
  • Maybe your firmware got an issue
    • update BIOS
    • update network card firmware
    • update RAID controller / HBA firmware
    • update system firmware
  • Maybe we (or upstream XenServer) removed/updated something.