Ok that backup after renabling NBD passed but one vm fell back to full. I ran another backup and that successed without issues.
Next i just renabled CBT on the 4 vms. 1 vm is VHD while the other 3 are qcow2.
current logs...
Apr 21 11:17:03 xo-ce xo-server[15617]: 2026-04-21T15:17:03.216Z xo:backups:worker INFO starting backup
Apr 21 11:17:03 xo-ce sudo[15630]: xo-service : PWD=/opt/xen-orchestra/packages/xo-server ; USER=root ; COMMAND=/usr/bin/mount -o -t nf>
Apr 21 11:17:03 xo-ce sudo[15630]: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=996)
Apr 21 11:17:03 xo-ce sudo[15630]: pam_unix(sudo:session): session closed for user root
Apr 21 11:17:07 xo-ce xo-server[15617]: 2026-04-21T15:17:07.526Z xo:xapi:xapi-disks INFO Error in openNbdCBT XapiError: SR_BACKEND_FAILU>
Apr 21 11:17:07 xo-ce xo-server[15617]: at XapiError.wrap (file:///opt/xen-orchestra/packages/xen-api/_XapiError.mjs:16:12)
Apr 21 11:17:07 xo-ce xo-server[15617]: at default (file:///opt/xen-orchestra/packages/xen-api/_getTaskResult.mjs:13:29)
Apr 21 11:17:07 xo-ce xo-server[15617]: at Xapi._addRecordToCache (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1078:24)
Apr 21 11:17:07 xo-ce xo-server[15617]: at file:///opt/xen-orchestra/packages/xen-api/index.mjs:1112:14
Apr 21 11:17:07 xo-ce xo-server[15617]: at Array.forEach (<anonymous>)
Apr 21 11:17:07 xo-ce xo-server[15617]: at Xapi._processEvents (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1102:12)
Apr 21 11:17:07 xo-ce xo-server[15617]: at Xapi._watchEvents (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1275:14)
Apr 21 11:17:07 xo-ce xo-server[15617]: at process.processTicksAndRejections (node:internal/process/task_queues:104:5) {
Apr 21 11:17:07 xo-ce xo-server[15617]: code: 'SR_BACKEND_FAILURE_460',
Apr 21 11:17:07 xo-ce xo-server[15617]: params: [
Apr 21 11:17:07 xo-ce xo-server[15617]: '',
Apr 21 11:17:07 xo-ce xo-server[15617]: 'Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrela>
Apr 21 11:17:07 xo-ce xo-server[15617]: ''
Apr 21 11:17:07 xo-ce xo-server[15617]: ],
Apr 21 11:17:07 xo-ce xo-server[15617]: call: undefined,
Apr 21 11:17:07 xo-ce xo-server[15617]: url: undefined,
Apr 21 11:17:07 xo-ce xo-server[15617]: task: task {
Apr 21 11:17:07 xo-ce xo-server[15617]: uuid: '133c55a2-2c71-d157-19bb-0c9ca4657ddb',
Apr 21 11:17:07 xo-ce xo-server[15617]: name_label: 'Async.VDI.list_changed_blocks',
Apr 21 11:17:07 xo-ce xo-server[15617]: name_description: '',
Apr 21 11:17:07 xo-ce xo-server[15617]: allowed_operations: [],
Apr 21 11:17:07 xo-ce xo-server[15617]: current_operations: {},
Apr 21 11:17:07 xo-ce xo-server[15617]: created: '20260421T15:17:07Z',
Apr 21 11:17:07 xo-ce xo-server[15617]: finished: '20260421T15:17:07Z',
Apr 21 11:17:07 xo-ce xo-server[15617]: status: 'failure',
Apr 21 11:17:07 xo-ce xo-server[15617]: resident_on: 'OpaqueRef:2b1bb3f1-ceee-ba8f-62d9-74362fee8b3d',
Apr 21 11:17:07 xo-ce xo-server[15617]: progress: 1,
Apr 21 11:17:07 xo-ce xo-server[15617]: type: '<none/>',
Apr 21 11:17:07 xo-ce xo-server[15617]: result: '',
Apr 21 11:17:07 xo-ce xo-server[15617]: error_info: [
Apr 21 11:17:07 xo-ce xo-server[15617]: 'SR_BACKEND_FAILURE_460',
Apr 21 11:17:07 xo-ce xo-server[15617]: '',
Apr 21 11:17:07 xo-ce xo-server[15617]: 'Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unre>
Apr 21 11:17:07 xo-ce xo-server[15617]: ''
Apr 21 11:17:07 xo-ce xo-server[15617]: ],
Apr 21 11:17:07 xo-ce xo-server[15617]: other_config: {},
Apr 21 11:17:07 xo-ce xo-server[15617]: subtask_of: 'OpaqueRef:NULL',
Apr 21 11:17:07 xo-ce xo-server[15617]: subtasks: [],
Apr 21 11:17:07 xo-ce xo-server[15617]: backtrace: '(((process xapi)(filename lib/backtrace.ml)(line 210))((process xapi)(filename o>
Apr 21 11:17:07 xo-ce xo-server[15617]: }
Apr 21 11:17:07 xo-ce xo-server[15617]: }
Apr 21 11:17:07 xo-ce xo-server[15617]: 2026-04-21T15:17:07.527Z xo:xapi:xapi-disks INFO Error in openNbdCBT XapiError: SR_BACKEND_FAILU>
Apr 21 11:17:07 xo-ce xo-server[15617]: at XapiError.wrap (file:///opt/xen-orchestra/packages/xen-api/_XapiError.mjs:16:12)
Apr 21 11:17:07 xo-ce xo-server[15617]: at default (file:///opt/xen-orchestra/packages/xen-api/_getTaskResult.mjs:13:29)
Apr 21 11:17:07 xo-ce xo-server[15617]: at Xapi._addRecordToCache (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1078:24)
Apr 21 11:17:07 xo-ce xo-server[15617]: at file:///opt/xen-orchestra/packages/xen-api/index.mjs:1112:14
Apr 21 11:17:07 xo-ce xo-server[15617]: at Array.forEach (<anonymous>)
Apr 21 11:17:07 xo-ce xo-server[15617]: at Xapi._processEvents (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1102:12)
Apr 21 11:17:07 xo-ce xo-server[15617]: at Xapi._watchEvents (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1275:14)
Apr 21 11:17:07 xo-ce xo-server[15617]: at process.processTicksAndRejections (node:internal/process/task_queues:104:5) {
Apr 21 11:17:07 xo-ce xo-server[15617]: code: 'SR_BACKEND_FAILURE_460',
Apr 21 11:17:07 xo-ce xo-server[15617]: params: [
Apr 21 11:17:07 xo-ce xo-server[15617]: '',
Apr 21 11:17:07 xo-ce xo-server[15617]: 'Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrela>
Apr 21 11:17:07 xo-ce xo-server[15617]: ''
Apr 21 11:17:07 xo-ce xo-server[15617]: ],
Apr 21 11:17:07 xo-ce xo-server[15617]: call: undefined,
Apr 21 11:17:07 xo-ce xo-server[15617]: url: undefined,
Apr 21 11:17:07 xo-ce xo-server[15617]: task: task {
Apr 21 11:17:07 xo-ce xo-server[15617]: uuid: '56ec5556-df0b-8b9e-eae9-b68d5f57495a',
Apr 21 11:17:07 xo-ce xo-server[15617]: name_label: 'Async.VDI.list_changed_blocks',
Apr 21 11:17:07 xo-ce xo-server[15617]: name_description: '',
Apr 21 11:17:07 xo-ce xo-server[15617]: allowed_operations: [],
Apr 21 11:17:07 xo-ce xo-server[15617]: current_operations: {},
Apr 21 11:17:07 xo-ce xo-server[15617]: created: '20260421T15:17:07Z',
Apr 21 11:17:07 xo-ce xo-server[15617]: finished: '20260421T15:17:07Z',
Apr 21 11:17:07 xo-ce xo-server[15617]: status: 'failure',
Apr 21 11:17:07 xo-ce xo-server[15617]: resident_on: 'OpaqueRef:2b1bb3f1-ceee-ba8f-62d9-74362fee8b3d',
Apr 21 11:17:07 xo-ce xo-server[15617]: progress: 1,
Apr 21 11:17:07 xo-ce xo-server[15617]: type: '<none/>',
Apr 21 11:17:07 xo-ce xo-server[15617]: result: '',
Apr 21 11:17:07 xo-ce xo-server[15617]: error_info: [
Apr 21 11:17:07 xo-ce xo-server[15617]: 'SR_BACKEND_FAILURE_460',
Apr 21 11:17:07 xo-ce xo-server[15617]: '',
Apr 21 11:17:07 xo-ce xo-server[15617]: 'Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unre>
Apr 21 11:17:07 xo-ce xo-server[15617]: ''
Apr 21 11:17:07 xo-ce xo-server[15617]: ],
Apr 21 11:17:07 xo-ce xo-server[15617]: other_config: {},
Apr 21 11:17:07 xo-ce xo-server[15617]: subtask_of: 'OpaqueRef:NULL',
Apr 21 11:17:07 xo-ce xo-server[15617]: subtasks: [],
Apr 21 11:17:07 xo-ce xo-server[15617]: backtrace: '(((process xapi)(filename lib/backtrace.ml)(line 210))((process xapi)(filename o>
Apr 21 11:17:07 xo-ce xo-server[15617]: }
Apr 21 11:17:07 xo-ce xo-server[15617]: }
Apr 21 11:17:07 xo-ce xo-server[15617]: 2026-04-21T15:17:07.529Z xo:xapi:xapi-disks INFO export through vhd
Apr 21 11:17:07 xo-ce xo-server[15617]: 2026-04-21T15:17:07.529Z xo:xapi:xapi-disks INFO export through qcow2
Apr 21 11:17:12 xo-ce xo-server[11902]: (node:11902) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 update >
Apr 21 11:17:12 xo-ce xo-server[11902]: 2026-04-21T15:17:12.839Z xo:xo-server WARN Node warning {
Apr 21 11:17:12 xo-ce xo-server[11902]: error: MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 update list>
Apr 21 11:17:12 xo-ce xo-server[11902]: at genericNodeError (node:internal/errors:985:15)
Apr 21 11:17:12 xo-ce xo-server[11902]: at wrappedFn (node:internal/errors:539:14)
Apr 21 11:17:12 xo-ce xo-server[11902]: at _addListener (node:events:590:17)
Apr 21 11:17:12 xo-ce xo-server[11902]: at Tasks.addListener (node:events:608:10)
Apr 21 11:17:12 xo-ce xo-server[11902]: at TaskController.getTasks (file:///opt/xen-orchestra/@xen-orchestra/rest-api/dist/tasks/t>
Apr 21 11:17:12 xo-ce xo-server[11902]: at ExpressTemplateService.buildPromise (/opt/xen-orchestra/node_modules/@tsoa/runtime/src/>
Apr 21 11:17:12 xo-ce xo-server[11902]: at ExpressTemplateService.apiHandler (/opt/xen-orchestra/node_modules/@tsoa/runtime/src/ro>
Apr 21 11:17:12 xo-ce xo-server[11902]: at TaskController_getTasks (file:///opt/xen-orchestra/@xen-orchestra/rest-api/dist/open-ap>
Apr 21 11:17:12 xo-ce xo-server[11902]: emitter: Tasks {
Apr 21 11:17:12 xo-ce xo-server[11902]: _events: [Object: null prototype],
Apr 21 11:17:12 xo-ce xo-server[11902]: _eventsCount: 3,
Apr 21 11:17:12 xo-ce xo-server[11902]: _maxListeners: undefined,
Apr 21 11:17:12 xo-ce xo-server[11902]: Symbol(shapeMode): false,
Apr 21 11:17:12 xo-ce xo-server[11902]: Symbol(kCapture): false
Apr 21 11:17:12 xo-ce xo-server[11902]: },
Apr 21 11:17:12 xo-ce xo-server[11902]: type: 'update',
Apr 21 11:17:12 xo-ce xo-server[11902]: count: 11
Apr 21 11:17:12 xo-ce xo-server[11902]: }
Apr 21 11:17:12 xo-ce xo-server[11902]: }
Apr 21 11:17:12 xo-ce xo-server[11902]: (node:11902) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 remove >
Apr 21 11:17:12 xo-ce xo-server[11902]: 2026-04-21T15:17:12.840Z xo:xo-server WARN Node warning {
Apr 21 11:17:12 xo-ce xo-server[11902]: error: MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 remove list>
Apr 21 11:17:12 xo-ce xo-server[11902]: at genericNodeError (node:internal/errors:985:15)
Apr 21 11:17:12 xo-ce xo-server[11902]: at wrappedFn (node:internal/errors:539:14)
Apr 21 11:17:12 xo-ce xo-server[11902]: at _addListener (node:events:590:17)
Apr 21 11:17:12 xo-ce xo-server[11902]: at Tasks.addListener (node:events:608:10)
Apr 21 11:17:12 xo-ce xo-server[11902]: at TaskController.getTasks (file:///opt/xen-orchestra/@xen-orchestra/rest-api/dist/tasks/t>
Apr 21 11:17:12 xo-ce xo-server[11902]: at ExpressTemplateService.buildPromise (/opt/xen-orchestra/node_modules/@tsoa/runtime/src/>
Apr 21 11:17:12 xo-ce xo-server[11902]: at ExpressTemplateService.apiHandler (/opt/xen-orchestra/node_modules/@tsoa/runtime/src/ro>
Apr 21 11:17:12 xo-ce xo-server[11902]: at TaskController_getTasks (file:///opt/xen-orchestra/@xen-orchestra/rest-api/dist/open-ap>
Apr 21 11:17:12 xo-ce xo-server[11902]: emitter: Tasks {
Apr 21 11:17:12 xo-ce xo-server[11902]: _events: [Object: null prototype],
Apr 21 11:17:12 xo-ce xo-server[11902]: _eventsCount: 3,
Apr 21 11:17:12 xo-ce xo-server[11902]: _maxListeners: undefined,
Apr 21 11:17:12 xo-ce xo-server[11902]: Symbol(shapeMode): false,
Apr 21 11:17:12 xo-ce xo-server[11902]: Symbol(kCapture): false
Apr 21 11:17:12 xo-ce xo-server[11902]: },
Apr 21 11:17:12 xo-ce xo-server[11902]: type: 'remove',
Apr 21 11:17:12 xo-ce xo-server[11902]: count: 11
Apr 21 11:17:12 xo-ce xo-server[11902]: }
Apr 21 11:17:12 xo-ce xo-server[11902]: }
Apr 21 11:17:21 xo-ce xo-server[15617]: 2026-04-21T15:17:21.243Z xo:xapi:xapi-disks INFO Error in openNbdCBT XapiError: SR_BACKEND_FAILU>
Apr 21 11:17:21 xo-ce xo-server[15617]: at XapiError.wrap (file:///opt/xen-orchestra/packages/xen-api/_XapiError.mjs:16:12)
Apr 21 11:17:21 xo-ce xo-server[15617]: at default (file:///opt/xen-orchestra/packages/xen-api/_getTaskResult.mjs:13:29)
Apr 21 11:17:21 xo-ce xo-server[15617]: at Xapi._addRecordToCache (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1078:24)
Apr 21 11:17:21 xo-ce xo-server[15617]: at file:///opt/xen-orchestra/packages/xen-api/index.mjs:1112:14
Apr 21 11:17:21 xo-ce xo-server[15617]: at Array.forEach (<anonymous>)
Apr 21 11:17:21 xo-ce xo-server[15617]: at Xapi._processEvents (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1102:12)
Apr 21 11:17:21 xo-ce xo-server[15617]: at Xapi._watchEvents (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1275:14)
Apr 21 11:17:21 xo-ce xo-server[15617]: at process.processTicksAndRejections (node:internal/process/task_queues:104:5) {
Apr 21 11:17:21 xo-ce xo-server[15617]: code: 'SR_BACKEND_FAILURE_460',
Apr 21 11:17:21 xo-ce xo-server[15617]: params: [
Apr 21 11:17:21 xo-ce xo-server[15617]: '',
Apr 21 11:17:21 xo-ce xo-server[15617]: 'Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrela>
Apr 21 11:17:21 xo-ce xo-server[15617]: ''
Apr 21 11:17:21 xo-ce xo-server[15617]: ],
Apr 21 11:17:21 xo-ce xo-server[15617]: call: undefined,
Apr 21 11:17:21 xo-ce xo-server[15617]: url: undefined,
Apr 21 11:17:21 xo-ce xo-server[15617]: task: task {
Apr 21 11:17:21 xo-ce xo-server[15617]: uuid: '7b860feb-cd29-94f7-bb50-3d34d826464a',
Apr 21 11:17:21 xo-ce xo-server[15617]: name_label: 'Async.VDI.list_changed_blocks',
Apr 21 11:17:21 xo-ce xo-server[15617]: name_description: '',
Apr 21 11:17:21 xo-ce xo-server[15617]: allowed_operations: [],
Apr 21 11:17:21 xo-ce xo-server[15617]: current_operations: {},
Apr 21 11:17:21 xo-ce xo-server[15617]: created: '20260421T15:17:20Z',
Apr 21 11:17:21 xo-ce xo-server[15617]: finished: '20260421T15:17:21Z',
Apr 21 11:17:21 xo-ce xo-server[15617]: status: 'failure',
Apr 21 11:17:21 xo-ce xo-server[15617]: resident_on: 'OpaqueRef:2b1bb3f1-ceee-ba8f-62d9-74362fee8b3d',
Apr 21 11:17:21 xo-ce xo-server[15617]: progress: 1,
Apr 21 11:17:21 xo-ce xo-server[15617]: type: '<none/>',
Apr 21 11:17:21 xo-ce xo-server[15617]: result: '',
Apr 21 11:17:21 xo-ce xo-server[15617]: error_info: [
Apr 21 11:17:21 xo-ce xo-server[15617]: 'SR_BACKEND_FAILURE_460',
Apr 21 11:17:21 xo-ce xo-server[15617]: '',
Apr 21 11:17:21 xo-ce xo-server[15617]: 'Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unre>
Apr 21 11:17:21 xo-ce xo-server[15617]: ''
Apr 21 11:17:21 xo-ce xo-server[15617]: ],
Apr 21 11:17:21 xo-ce xo-server[15617]: other_config: {},
Apr 21 11:17:21 xo-ce xo-server[15617]: subtask_of: 'OpaqueRef:NULL',
Apr 21 11:17:21 xo-ce xo-server[15617]: subtasks: [],
Apr 21 11:17:21 xo-ce xo-server[15617]: backtrace: '(((process xapi)(filename lib/backtrace.ml)(line 210))((process xapi)(filename o>
Apr 21 11:17:21 xo-ce xo-server[15617]: }
Apr 21 11:17:21 xo-ce xo-server[15617]: }
Apr 21 11:17:21 xo-ce xo-server[15617]: 2026-04-21T15:17:21.245Z xo:xapi:xapi-disks INFO export through qcow2
Apr 21 11:18:18 xo-ce xo-server[15617]: 2026-04-21T15:18:18.486Z xo:backups:worker ERROR unhandled error event {
Apr 21 11:18:18 xo-ce xo-server[15617]: error: RequestAbortedError [AbortError]: Request aborted
Apr 21 11:18:18 xo-ce xo-server[15617]: at BodyReadable.destroy (/opt/xen-orchestra/node_modules/undici/lib/api/readable.js:51:13)
Apr 21 11:18:18 xo-ce xo-server[15617]: at QcowStream.close (file:///opt/xen-orchestra/@xen-orchestra/qcow2/dist/disk/QcowStream.m>
Apr 21 11:18:18 xo-ce xo-server[15617]: at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/di>
Apr 21 11:18:18 xo-ce xo-server[15617]: at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiQc>
Apr 21 11:18:18 xo-ce xo-server[15617]: at DiskLargerBlock.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Dis>
Apr 21 11:18:18 xo-ce xo-server[15617]: at TimeoutDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPas>
Apr 21 11:18:18 xo-ce xo-server[15617]: at XapiStreamNbdSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist>
Apr 21 11:18:18 xo-ce xo-server[15617]: at XapiStreamNbdSource.init (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiStrea>
Apr 21 11:18:18 xo-ce xo-server[15617]: at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
Apr 21 11:18:18 xo-ce xo-server[15617]: at async #openNbdStream (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:108:>
Apr 21 11:18:18 xo-ce xo-server[15617]: code: 'UND_ERR_ABORTED',
Apr 21 11:18:18 xo-ce xo-server[15617]: Symbol(undici.error.UND_ERR): true,
Apr 21 11:18:18 xo-ce xo-server[15617]: Symbol(undici.error.UND_ERR_ABORT): true,
Apr 21 11:18:18 xo-ce xo-server[15617]: Symbol(undici.error.UND_ERR_ABORTED): true
Apr 21 11:18:18 xo-ce xo-server[15617]: }
Apr 21 11:18:18 xo-ce xo-server[15617]: }
Apr 21 11:18:23 xo-ce xo-server[15617]: 2026-04-21T15:18:23.349Z xo:xapi:xapi-disks INFO Error in openNbdCBT XapiError: SR_BACKEND_FAILU>
Apr 21 11:18:23 xo-ce xo-server[15617]: at XapiError.wrap (file:///opt/xen-orchestra/packages/xen-api/_XapiError.mjs:16:12)
Apr 21 11:18:23 xo-ce xo-server[15617]: at default (file:///opt/xen-orchestra/packages/xen-api/_getTaskResult.mjs:13:29)
Apr 21 11:18:23 xo-ce xo-server[15617]: at Xapi._addRecordToCache (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1078:24)
Apr 21 11:18:23 xo-ce xo-server[15617]: at file:///opt/xen-orchestra/packages/xen-api/index.mjs:1112:14
Apr 21 11:18:23 xo-ce xo-server[15617]: at Array.forEach (<anonymous>)
Apr 21 11:18:23 xo-ce xo-server[15617]: at Xapi._processEvents (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1102:12)
Apr 21 11:18:23 xo-ce xo-server[15617]: at Xapi._watchEvents (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1275:14)
Apr 21 11:18:23 xo-ce xo-server[15617]: at process.processTicksAndRejections (node:internal/process/task_queues:104:5) {
Apr 21 11:18:23 xo-ce xo-server[15617]: code: 'SR_BACKEND_FAILURE_460',
Apr 21 11:18:23 xo-ce xo-server[15617]: params: [
Apr 21 11:18:23 xo-ce xo-server[15617]: '',
Apr 21 11:18:23 xo-ce xo-server[15617]: 'Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrela>
Apr 21 11:18:23 xo-ce xo-server[15617]: ''
Apr 21 11:18:23 xo-ce xo-server[15617]: ],
Apr 21 11:18:23 xo-ce xo-server[15617]: call: undefined,
Apr 21 11:18:23 xo-ce xo-server[15617]: url: undefined,
Apr 21 11:18:23 xo-ce xo-server[15617]: task: task {
Apr 21 11:18:23 xo-ce xo-server[15617]: uuid: '79eb5cac-25c8-c33e-45a8-35d36a92d662',
Apr 21 11:18:23 xo-ce xo-server[15617]: name_label: 'Async.VDI.list_changed_blocks',
Apr 21 11:18:23 xo-ce xo-server[15617]: name_description: '',
Apr 21 11:18:23 xo-ce xo-server[15617]: allowed_operations: [],
Apr 21 11:18:23 xo-ce xo-server[15617]: current_operations: {},
Apr 21 11:18:23 xo-ce xo-server[15617]: created: '20260421T15:18:22Z',
Apr 21 11:18:23 xo-ce xo-server[15617]: finished: '20260421T15:18:23Z',
Apr 21 11:18:23 xo-ce xo-server[15617]: status: 'failure',
Apr 21 11:18:23 xo-ce xo-server[15617]: resident_on: 'OpaqueRef:2b1bb3f1-ceee-ba8f-62d9-74362fee8b3d',
Apr 21 11:18:23 xo-ce xo-server[15617]: progress: 1,
Apr 21 11:18:23 xo-ce xo-server[15617]: type: '<none/>',
Apr 21 11:18:23 xo-ce xo-server[15617]: result: '',
Apr 21 11:18:23 xo-ce xo-server[15617]: error_info: [
Apr 21 11:18:23 xo-ce xo-server[15617]: 'SR_BACKEND_FAILURE_460',
Apr 21 11:18:23 xo-ce xo-server[15617]: '',
Apr 21 11:18:23 xo-ce xo-server[15617]: 'Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unre>
Apr 21 11:18:23 xo-ce xo-server[15617]: ''
Apr 21 11:18:23 xo-ce xo-server[15617]: ],
Apr 21 11:18:23 xo-ce xo-server[15617]: other_config: {},
Apr 21 11:18:23 xo-ce xo-server[15617]: subtask_of: 'OpaqueRef:NULL',
Apr 21 11:18:23 xo-ce xo-server[15617]: subtasks: [],
Apr 21 11:18:23 xo-ce xo-server[15617]: backtrace: '(((process xapi)(filename lib/backtrace.ml)(line 210))((process xapi)(filename o>
Apr 21 11:18:23 xo-ce xo-server[15617]: }
Apr 21 11:18:23 xo-ce xo-server[15617]: }
Apr 21 11:18:23 xo-ce xo-server[15617]: 2026-04-21T15:18:23.351Z xo:xapi:xapi-disks INFO export through qcow2
Apr 21 11:20:07 xo-ce xo-server[15617]: 2026-04-21T15:20:07.012Z xo:backups:worker ERROR unhandled error event {
Apr 21 11:20:07 xo-ce xo-server[15617]: error: RequestAbortedError [AbortError]: Request aborted
Apr 21 11:20:07 xo-ce xo-server[15617]: at BodyReadable.destroy (/opt/xen-orchestra/node_modules/undici/lib/api/readable.js:51:13)
Apr 21 11:20:07 xo-ce xo-server[15617]: at QcowStream.close (file:///opt/xen-orchestra/@xen-orchestra/qcow2/dist/disk/QcowStream.m>
Apr 21 11:20:07 xo-ce xo-server[15617]: at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/di>
Apr 21 11:20:07 xo-ce xo-server[15617]: at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiQc>
Apr 21 11:20:07 xo-ce xo-server[15617]: at DiskLargerBlock.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Dis>
Apr 21 11:20:07 xo-ce xo-server[15617]: at TimeoutDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPas>
Apr 21 11:20:07 xo-ce xo-server[15617]: at XapiStreamNbdSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist>
Apr 21 11:20:07 xo-ce xo-server[15617]: at XapiStreamNbdSource.init (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiStrea>
Apr 21 11:20:07 xo-ce xo-server[15617]: at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
Apr 21 11:20:07 xo-ce xo-server[15617]: at async #openNbdStream (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:108:>
Apr 21 11:20:07 xo-ce xo-server[15617]: code: 'UND_ERR_ABORTED',
Apr 21 11:20:07 xo-ce xo-server[15617]: Symbol(undici.error.UND_ERR): true,
Apr 21 11:20:07 xo-ce xo-server[15617]: Symbol(undici.error.UND_ERR_ABORT): true,
Apr 21 11:20:07 xo-ce xo-server[15617]: Symbol(undici.error.UND_ERR_ABORTED): true
Apr 21 11:20:07 xo-ce xo-server[15617]: }
Apr 21 11:20:07 xo-ce xo-server[15617]: }
Apr 21 11:20:08 xo-ce xo-server[15617]: 2026-04-21T15:20:08.303Z xo:xapi WARN retry {
Apr 21 11:20:08 xo-ce xo-server[15617]: attemptNumber: 0,
Apr 21 11:20:08 xo-ce xo-server[15617]: delay: 5000,
Apr 21 11:20:08 xo-ce xo-server[15617]: error: XapiError: VDI_IN_USE(OpaqueRef:995ebf5b-c10d-e009-1508-289995ef1634, destroy)
Apr 21 11:20:08 xo-ce xo-server[15617]: at XapiError.wrap (file:///opt/xen-orchestra/packages/xen-api/_XapiError.mjs:16:12)
Apr 21 11:20:08 xo-ce xo-server[15617]: at default (file:///opt/xen-orchestra/packages/xen-api/_getTaskResult.mjs:13:29)
Apr 21 11:20:08 xo-ce xo-server[15617]: at Xapi._addRecordToCache (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1078:24)
Apr 21 11:20:08 xo-ce xo-server[15617]: at file:///opt/xen-orchestra/packages/xen-api/index.mjs:1112:14
Apr 21 11:20:08 xo-ce xo-server[15617]: at Array.forEach (<anonymous>)
Apr 21 11:20:08 xo-ce xo-server[15617]: at Xapi._processEvents (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1102:12)
Apr 21 11:20:08 xo-ce xo-server[15617]: at Xapi._watchEvents (file:///opt/xen-orchestra/packages/xen-api/index.mjs:1275:14)
Apr 21 11:20:08 xo-ce xo-server[15617]: at process.processTicksAndRejections (node:internal/process/task_queues:104:5) {
Apr 21 11:20:08 xo-ce xo-server[15617]: code: 'VDI_IN_USE',
Apr 21 11:20:08 xo-ce xo-server[15617]: params: [ 'OpaqueRef:995ebf5b-c10d-e009-1508-289995ef1634', 'destroy' ],
Apr 21 11:20:08 xo-ce xo-server[15617]: call: undefined,
Apr 21 11:20:08 xo-ce xo-server[15617]: url: undefined,
Apr 21 11:20:08 xo-ce xo-server[15617]: task: task {
Apr 21 11:20:08 xo-ce xo-server[15617]: uuid: 'ea880a7f-1b4d-dbfa-bc7b-c8e4d7e85a23',
Apr 21 11:20:08 xo-ce xo-server[15617]: name_label: 'Async.VDI.destroy',
Apr 21 11:20:08 xo-ce xo-server[15617]: name_description: '',
Apr 21 11:20:08 xo-ce xo-server[15617]: allowed_operations: [],
Apr 21 11:20:08 xo-ce xo-server[15617]: current_operations: {},
Apr 21 11:20:08 xo-ce xo-server[15617]: created: '20260421T15:20:08Z',
Apr 21 11:20:08 xo-ce xo-server[15617]: finished: '20260421T15:20:08Z',
Apr 21 11:20:08 xo-ce xo-server[15617]: status: 'failure',
Apr 21 11:20:08 xo-ce xo-server[15617]: resident_on: 'OpaqueRef:2b1bb3f1-ceee-ba8f-62d9-74362fee8b3d',
Apr 21 11:20:08 xo-ce xo-server[15617]: progress: 1,
Apr 21 11:20:08 xo-ce xo-server[15617]: type: '<none/>',
Apr 21 11:20:08 xo-ce xo-server[15617]: result: '',
Apr 21 11:20:08 xo-ce xo-server[15617]: error_info: [Array],
Apr 21 11:20:08 xo-ce xo-server[15617]: other_config: {},
Apr 21 11:20:08 xo-ce xo-server[15617]: subtask_of: 'OpaqueRef:NULL',
Apr 21 11:20:08 xo-ce xo-server[15617]: subtasks: [],
Apr 21 11:20:08 xo-ce xo-server[15617]: backtrace: '(((process xapi)(filename ocaml/xapi/message_forwarding.ml)(line 5212))((proce>
Apr 21 11:20:08 xo-ce xo-server[15617]: }
Apr 21 11:20:08 xo-ce xo-server[15617]: },
Apr 21 11:20:08 xo-ce xo-server[15617]: fn: 'destroy',
Apr 21 11:20:08 xo-ce xo-server[15617]: arguments: [ 'OpaqueRef:995ebf5b-c10d-e009-1508-289995ef1634' ],
Apr 21 11:20:08 xo-ce xo-server[15617]: pool: {
Apr 21 11:20:08 xo-ce xo-server[15617]: uuid: '939ed551-fbd6-9868-52d8-d3997b7bf7da',
Apr 21 11:20:08 xo-ce xo-server[15617]: name_label: 'xcp-ng-Pool1'
Apr 21 11:20:08 xo-ce xo-server[15617]: }
Apr 21 11:20:08 xo-ce xo-server[15617]: }
Apr 21 11:20:08 xo-ce xo-server[15617]: 2026-04-21T15:20:08.518Z xo:xapi:vdi INFO OpaqueRef:beb97f2f-37c4-b707-4a19-b25af5efe57f has be>
Apr 21 11:20:08 xo-ce xo-server[15617]: vdiRef: 'OpaqueRef:995ebf5b-c10d-e009-1508-289995ef1634',
Apr 21 11:20:08 xo-ce xo-server[15617]: vbdRef: 'OpaqueRef:beb97f2f-37c4-b707-4a19-b25af5efe57f'
Apr 21 11:20:08 xo-ce xo-server[15617]: }
Apr 21 11:22:44 xo-ce xo-server[15617]: 2026-04-21T15:22:44.906Z xo:backups:worker ERROR unhandled error event {
Apr 21 11:22:44 xo-ce xo-server[15617]: error: RequestAbortedError [AbortError]: Request aborted
Apr 21 11:22:44 xo-ce xo-server[15617]: at BodyReadable.destroy (/opt/xen-orchestra/node_modules/undici/lib/api/readable.js:51:13)
Apr 21 11:22:44 xo-ce xo-server[15617]: at QcowStream.close (file:///opt/xen-orchestra/@xen-orchestra/qcow2/dist/disk/QcowStream.m>
Apr 21 11:22:44 xo-ce xo-server[15617]: at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/di>
Apr 21 11:22:44 xo-ce xo-server[15617]: at XapiQcow2StreamSource.close (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiQc>
Apr 21 11:22:44 xo-ce xo-server[15617]: at DiskLargerBlock.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/Dis>
Apr 21 11:22:44 xo-ce xo-server[15617]: at TimeoutDisk.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist/DiskPas>
Apr 21 11:22:44 xo-ce xo-server[15617]: at XapiStreamNbdSource.close (file:///opt/xen-orchestra/@xen-orchestra/disk-transform/dist>
Apr 21 11:22:44 xo-ce xo-server[15617]: at XapiStreamNbdSource.init (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/XapiStrea>
Apr 21 11:22:44 xo-ce xo-server[15617]: at process.processTicksAndRejections (node:internal/process/task_queues:104:5)
Apr 21 11:22:44 xo-ce xo-server[15617]: at async #openNbdStream (file:///opt/xen-orchestra/@xen-orchestra/xapi/disks/Xapi.mjs:108:>
Apr 21 11:22:44 xo-ce xo-server[15617]: code: 'UND_ERR_ABORTED',
Apr 21 11:22:44 xo-ce xo-server[15617]: Symbol(undici.error.UND_ERR): true,
Apr 21 11:22:44 xo-ce xo-server[15617]: Symbol(undici.error.UND_ERR_ABORT): true,
Apr 21 11:22:44 xo-ce xo-server[15617]: Symbol(undici.error.UND_ERR_ABORTED): true
Apr 21 11:22:44 xo-ce xo-server[15617]: }
Apr 21 11:22:44 xo-ce xo-server[15617]: }
Apr 21 11:22:55 xo-ce xo-server[15617]: 2026-04-21T15:22:55.147Z xo:backups:worker INFO backup has ended
Apr 21 11:22:55 xo-ce sudo[15724]: xo-service : PWD=/opt/xen-orchestra/packages/xo-server ; USER=root ; COMMAND=/usr/bin/umount /run/xo->
Apr 21 11:22:55 xo-ce sudo[15724]: pam_unix(sudo:session): session opened for user root(uid=0) by (uid=996)
Apr 21 11:22:55 xo-ce sudo[15724]: pam_unix(sudo:session): session closed for user root
Apr 21 11:22:55 xo-ce xo-server[15617]: 2026-04-21T15:22:55.218Z xo:backups:worker INFO process will exit {
Apr 21 11:22:55 xo-ce xo-server[15617]: duration: 352002058,
Apr 21 11:22:55 xo-ce xo-server[15617]: exitCode: 0,
Apr 21 11:22:55 xo-ce xo-server[15617]: resourceUsage: {
Apr 21 11:22:55 xo-ce xo-server[15617]: userCPUTime: 10232565,
Apr 21 11:22:55 xo-ce xo-server[15617]: systemCPUTime: 3061623,
Apr 21 11:22:55 xo-ce xo-server[15617]: maxRSS: 29708,
Apr 21 11:22:55 xo-ce xo-server[15617]: sharedMemorySize: 0,
Apr 21 11:22:55 xo-ce xo-server[15617]: unsharedDataSize: 0,
Apr 21 11:22:55 xo-ce xo-server[15617]: unsharedStackSize: 0,
Apr 21 11:22:55 xo-ce xo-server[15617]: minorPageFault: 147813,
Apr 21 11:22:55 xo-ce xo-server[15617]: majorPageFault: 0,
Apr 21 11:22:55 xo-ce xo-server[15617]: swappedOut: 0,
Apr 21 11:22:55 xo-ce xo-server[15617]: fsRead: 7592,
Apr 21 11:22:55 xo-ce xo-server[15617]: fsWrite: 2448976,
Apr 21 11:22:55 xo-ce xo-server[15617]: ipcSent: 0,
Apr 21 11:22:55 xo-ce xo-server[15617]: ipcReceived: 0,
Apr 21 11:22:55 xo-ce xo-server[15617]: signalsCount: 0,
Apr 21 11:22:55 xo-ce xo-server[15617]: voluntaryContextSwitches: 30551,
Apr 21 11:22:55 xo-ce xo-server[15617]: involuntaryContextSwitches: 1894
Apr 21 11:22:55 xo-ce xo-server[15617]: },
Apr 21 11:22:55 xo-ce xo-server[15617]: summary: { duration: '6m', cpuUsage: '4%', memoryUsage: '29.01 MiB' }
Apr 21 11:22:55 xo-ce xo-server[15617]: }
Back to VDI's not coalescing
[image: 1776785911637-screenshot-2026-04-21-113803.png]
