<![CDATA[CBT Error when powering on VM]]>I had to power off a VM then power it back on. However, it will not power back on now displaying this error:
Changed block tracking disabled due to inconsistent metadata. Changed Block Tracking metadata is inconsistent for disk "%number%".

I, of course, jumped right to looking the error up and found an article saying the first step is to back up the VM. So, I am copying it using the "Copy VM..." in XCP-NG Center. This VM is 600GB so I assume it will take a long while. Either way, does someone know how to fix this and get the VM powered back on successfully? I appreciate any ideas and/or instructions. Unfortunately I do not have a Paid version of XOA. (in know dumb....)
Thank you!

]]>https://xcp-ng.org/forum/topic/11254/cbt-error-when-powering-on-vmRSS for NodeFri, 10 Jul 2026 20:10:55 GMTMon, 08 Sep 2025 23:36:21 GMT60<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 23:20:06 GMT]]>AlmaLinux 8.10

]]>https://xcp-ng.org/forum/post/97190https://xcp-ng.org/forum/post/97190Tue, 09 Sep 2025 23:20:06 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 22:39:01 GMT]]>DisksControlDomain.png

]]>https://xcp-ng.org/forum/post/97189https://xcp-ng.org/forum/post/97189Tue, 09 Sep 2025 22:39:01 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 22:32:07 GMT]]>I am still hoping for a miracle with the original VM. Why are there two disks shown if I select the VM in XOA and click attach disk. Image attachedDisks Shown.png

]]>https://xcp-ng.org/forum/post/97188https://xcp-ng.org/forum/post/97188Tue, 09 Sep 2025 22:32:07 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 19:05:13 GMT]]>OK keep us posted. Which Alma version exactly? (so we can try to reproduce)

]]>https://xcp-ng.org/forum/post/97180https://xcp-ng.org/forum/post/97180Tue, 09 Sep 2025 19:05:13 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 16:17:26 GMT]]>Just passing this. I have created a new VM twice now. Once DNF updates are done and it reboots it boots to grub. I'm reinstalling now and will be updating grub before the reboot I guess.

]]>https://xcp-ng.org/forum/post/97169https://xcp-ng.org/forum/post/97169Tue, 09 Sep 2025 16:17:26 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 14:04:44 GMT]]>It's hard to tell what's going on. So to avoid any environment issue, deploy quickly an XOA free, create a VM and see from there.

]]>https://xcp-ng.org/forum/post/97166https://xcp-ng.org/forum/post/97166Tue, 09 Sep 2025 14:04:44 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 13:59:04 GMT]]>Can I do everything in XOA Lite that I can in XCP-NG Center?

]]>https://xcp-ng.org/forum/post/97165https://xcp-ng.org/forum/post/97165Tue, 09 Sep 2025 13:59:04 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 13:58:02 GMT]]>Center. I'm trying to get away from that and go with XO

]]>https://xcp-ng.org/forum/post/97164https://xcp-ng.org/forum/post/97164Tue, 09 Sep 2025 13:58:02 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 13:49:36 GMT]]>@rustylh How are you creating your VM ?

]]>https://xcp-ng.org/forum/post/97163https://xcp-ng.org/forum/post/97163Tue, 09 Sep 2025 13:49:36 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 13:47:43 GMT]]>I understand. However, this is a bran new VM I just created with a new name. NewBuildErrors.png

]]>https://xcp-ng.org/forum/post/97161https://xcp-ng.org/forum/post/97161Tue, 09 Sep 2025 13:47:43 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 13:46:21 GMT]]>That's an OS issue, as I said. You need to mount it in another VM as an extra drive, or use a LiveCD to explore the filesystem

]]>https://xcp-ng.org/forum/post/97160https://xcp-ng.org/forum/post/97160Tue, 09 Sep 2025 13:46:21 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 13:44:10 GMT]]>Ok, this is weird. I just created a new VM with new name. It is booting and hung at the same message.
vdb vdb-5696: 19 xenbu_dev_prob on device/vdb/5696

Not sure what to think.

]]>https://xcp-ng.org/forum/post/97159https://xcp-ng.org/forum/post/97159Tue, 09 Sep 2025 13:44:10 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 13:43:55 GMT]]>I would check inside the OS that cannot boot anymore, running an fsck

That's what I would do

]]>https://xcp-ng.org/forum/post/97158https://xcp-ng.org/forum/post/97158Tue, 09 Sep 2025 13:43:55 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 13:34:27 GMT]]>Ok, thank you for looking. Is there anything in my previous screen shots that sticks out? Something else I can try?

]]>https://xcp-ng.org/forum/post/97157https://xcp-ng.org/forum/post/97157Tue, 09 Sep 2025 13:34:27 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 13:25:06 GMT]]>To me, you have an issue inside your OS. You can try to mount the disk of this VM in another VM and try to check what's going on, maybe do a file system check or something.

]]>https://xcp-ng.org/forum/post/97156https://xcp-ng.org/forum/post/97156Tue, 09 Sep 2025 13:25:06 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 13:19:53 GMT]]>Same result

]]>https://xcp-ng.org/forum/post/97155https://xcp-ng.org/forum/post/97155Tue, 09 Sep 2025 13:19:53 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 13:15:20 GMT]]>I tried the second Kernel. I can try safe from Grub. I am not familiar with that, but I will try.

]]>https://xcp-ng.org/forum/post/97154https://xcp-ng.org/forum/post/97154Tue, 09 Sep 2025 13:15:20 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 13:13:50 GMT]]>@rustylh Can you try another kernel version or a safe mode if available in the Grub menu of your VM? It seems the OS cannot boot anymore, for whatever reason happened inside the VM.

]]>https://xcp-ng.org/forum/post/97153https://xcp-ng.org/forum/post/97153Tue, 09 Sep 2025 13:13:50 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 13:54:15 GMT]]>That last power on attempt log

{
  "id": "0mfciiw3i",
  "properties": {
    "method": "vm.start",
    "params": {
      "id": "14d739cc-ac03-591f-f9e2-0206000c4fc4",
      "bypassMacAddressesCheck": false,
      "force": false
    },
    "name": "API call: vm.start",
    "userId": "6b37221b-22b6-452b-ba2a-7bd46fc924a9",
    "type": "api.call"
  },
  "start": 1757420053758,
  "status": "failure",
  "updatedAt": 1757420054029,
  "end": 1757420054029,
  "result": {
    "code": "INTERNAL_ERROR",
    "params": [
      "Not_found"
    ],
    "call": {
      "duration": 267,
      "method": "VM.start",
      "params": [
        "* session id *",
        "OpaqueRef:570f1cc5-9197-4bd4-8fc3-f75f90e36e4b",
        false,
        false
      ]
    },
    "message": "INTERNAL_ERROR(Not_found)",
    "name": "XapiError",
    "stack": "XapiError: INTERNAL_ERROR(Not_found)\n    at Function.wrap (file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/_XapiError.mjs:16:12)\n    at file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/transports/json-rpc.mjs:38:21\n    at runNextTicks (node:internal/process/task_queues:60:5)\n    at processImmediate (node:internal/timers:454:9)\n    at process.callbackTrampoline (node:internal/async_hooks:130:17)"
  }
]]>https://xcp-ng.org/forum/post/97152https://xcp-ng.org/forum/post/97152Tue, 09 Sep 2025 13:54:15 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 13:01:08 GMT]]>Does this help?ShowVM.png

]]>https://xcp-ng.org/forum/post/97151https://xcp-ng.org/forum/post/97151Tue, 09 Sep 2025 13:01:08 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 12:47:04 GMT]]>XOA Just shows it starting XOA VM Startup.png

]]>https://xcp-ng.org/forum/post/97150https://xcp-ng.org/forum/post/97150Tue, 09 Sep 2025 12:47:04 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 12:43:52 GMT]]>VMShowing.png

]]>https://xcp-ng.org/forum/post/97149https://xcp-ng.org/forum/post/97149Tue, 09 Sep 2025 12:43:52 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 12:42:53 GMT]]>It acts like it is starting normally and goes to the Kernel version selection for Alma, starts to boot then shows paused, then goes back to powered off state and shows the attached.

]]>https://xcp-ng.org/forum/post/97148https://xcp-ng.org/forum/post/97148Tue, 09 Sep 2025 12:42:53 GMT<![CDATA[Reply to CBT Error when powering on VM on Tue, 09 Sep 2025 12:36:45 GMT]]>Are you sure the VM operating system isn't crashing? Are you seeing anything during boot phase?

]]>https://xcp-ng.org/forum/post/97147https://xcp-ng.org/forum/post/97147Tue, 09 Sep 2025 12:36:45 GMT