Backup Suddenly Failing

[Pilow]

@JSylvia007 did you test create a new job, with just this VM ?
is it still failing ?

a new job would have a separate UUID and create new folders with clean metadatas on your NAS.

[JSylvia007]

@Pilow - I did just that. Fails in the exact same way.

[Pilow]

@JSylvia007 long stretch test but, if you have some space on the SR where resides the VM.
shut the VM down and full-clone it.

try a backup of this clone.

report back ?

[JSylvia007]

@Pilow - I can try this, but not until a bit later.

[JSylvia007]

@pilow & @florent - The plot thickens. I'm unable to full-clone the VM...

{
  "id": "0mn6ds7ih",
  "properties": {
    "method": "vm.copy",
    "params": {
      "vm": "afe4bee2-745d-da4a-0016-c74751856556",
      "sr": "247ef8a6-9c10-e100-acd3-c9193f34ddc3",
      "name": "ADMIN-VM02_COPY"
    },
    "name": "API call: vm.copy",
    "userId": "b06e5d9f-a602-4b76-a7bb-b1c915712ca3",
    "type": "api.call"
  },
  "start": 1774463552009,
  "status": "failure",
  "updatedAt": 1774464678345,
  "end": 1774464678344,
  "result": {
    "code": "VDI_COPY_FAILED",
    "params": [
      "Fatal error: exception Unix.Unix_error(Unix.EIO, \"read\", \"\")\n"
    ],
    "task": {
      "uuid": "555f90cc-12b7-7c2c-a2df-0f29a16a007e",
      "name_label": "Async.VM.copy",
      "name_description": "",
      "allowed_operations": [],
      "current_operations": {},
      "created": "20260325T18:32:32Z",
      "finished": "20260325T18:51:18Z",
      "status": "failure",
      "resident_on": "OpaqueRef:22c5ddea-00c6-f412-4439-536c4bbdca63",
      "progress": 1,
      "type": "<none/>",
      "result": "",
      "error_info": [
        "VDI_COPY_FAILED",
        "Fatal error: exception Unix.Unix_error(Unix.EIO, \"read\", \"\")\n"
      ],
      "other_config": {},
      "subtask_of": "OpaqueRef:NULL",
      "subtasks": [
        "OpaqueRef:655cc4e3-0205-ba7d-5831-4b191ecfba9e"
      ],
      "backtrace": "(((process xapi)(filename ocaml/xapi/xapi_vm_clone.ml)(line 77))((process xapi)(filename list.ml)(line 110))((process xapi)(filename ocaml/xapi/xapi_vm_clone.ml)(line 120))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 24))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 39))((process xapi)(filename ocaml/xapi/xapi_vm_clone.ml)(line 128))((process xapi)(filename ocaml/xapi/xapi_vm_clone.ml)(line 171))((process xapi)(filename ocaml/xapi/xapi_vm_clone.ml)(line 210))((process xapi)(filename ocaml/xapi/xapi_vm_clone.ml)(line 221))((process xapi)(filename list.ml)(line 121))((process xapi)(filename ocaml/xapi/xapi_vm_clone.ml)(line 223))((process xapi)(filename ocaml/xapi/xapi_vm_clone.ml)(line 461))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 24))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 39))((process xapi)(filename ocaml/xapi/xapi_vm.ml)(line 791))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 24))((process xapi)(filename ocaml/libs/xapi-stdext/lib/xapi-stdext-pervasives/pervasiveext.ml)(line 39))((process xapi)(filename ocaml/xapi/rbac.ml)(line 228))((process xapi)(filename ocaml/xapi/rbac.ml)(line 238))((process xapi)(filename ocaml/xapi/server_helpers.ml)(line 78)))"
    },
    "message": "VDI_COPY_FAILED(Fatal error: exception Unix.Unix_error(Unix.EIO, \"read\", \"\")\n)",
    "name": "XapiError",
    "stack": "XapiError: VDI_COPY_FAILED(Fatal error: exception Unix.Unix_error(Unix.EIO, \"read\", \"\")\n)\n    at XapiError.wrap (file:///opt/xo/xo-builds/xen-orchestra-202603241416/packages/xen-api/_XapiError.mjs:16:12)\n    at default (file:///opt/xo/xo-builds/xen-orchestra-202603241416/packages/xen-api/_getTaskResult.mjs:13:29)\n    at Xapi._addRecordToCache (file:///opt/xo/xo-builds/xen-orchestra-202603241416/packages/xen-api/index.mjs:1078:24)\n    at file:///opt/xo/xo-builds/xen-orchestra-202603241416/packages/xen-api/index.mjs:1112:14\n    at Array.forEach (<anonymous>)\n    at Xapi._processEvents (file:///opt/xo/xo-builds/xen-orchestra-202603241416/packages/xen-api/index.mjs:1102:12)\n    at Xapi._watchEvents (file:///opt/xo/xo-builds/xen-orchestra-202603241416/packages/xen-api/index.mjs:1275:14)"
  }
}

[Pilow]

@JSylvia007

      "Fatal error: exception Unix.Unix_error(Unix.EIO, \"read\", \"\")\n"

mmmm SR is failing ?
can you restore the last known good state of this VM (in parallel of the one in production) and try to backup this restored version ?

[JSylvia007]

@Pilow - Well... Didn't you ruin my day yesterday... LOL.

Long story short... The local SR is on a RAID5 in the server. The damn thing isn't reporting that a drive has failed (hard failed, it's not even showing up in the RAID Controller anymore). The array says degraded, but fine... So it's weird to me that this could be related. I have a drive on order and plan to rebuild the array as soon as the drive arrives.

Once that happens, I will start investigating this again... Maybe it magically clears up.

[Pilow]

@JSylvia007 hoho... beware of array rebuilding on old disks

[JSylvia007]

@Pilow - This is why I'm nervous... BUT... EVERYTHING else has a good backup. I plan to shut down all the VMs and then backup once more while I rebuild the array.
Fingers crossed.

[ph7]

Living on the edge at my home lab

In my other NAS the oldest one is closing up 11 years