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]

@olivierlambert I just noticed that my VM's do not show any disk: [image: 1776781412213-1e714df4-15a4-42a1-8d74-63b36db7debe-image.jpeg] But I know they are working because I can migrate them by migrating both host and disk [image: 1776781462278-701a60d8-0e0c-4532-8285-730876d9cdc4-image.jpeg]

@olivierlambert I added this feature request in the backlog regarding RPU improvements.

News about development of XCP-ng Center? In particular any way to customize the level of alert to see? I now see level 4 alert that is more or less "info" and I prefere to not see as "alert".

@yannsionneau said: Can you retry with an up-to-date xcp-ng 8.3 please? FYI on recent XCP-ng 8.3 versions the pci-passthrough will enable the ROM expansion bar. The guest VM will have access to it, so no need to pass it via qemu anymore. See my comment on GitHub: https://github.com/xcp-ng/xcp/issues/786#issuecomment-4281846490 Regards, Yann I tried, yes. I confirmed as well on github that the patch does what it suppose to do - it exposes ROM BAR, but that alone is not sufficient to get our cards working. More in my other topic.. I believe it will still fix a lot of issues, and it could potentially fix amd gpu passthrough for some card, but not Phoenix, Raphael and this generation of Ryzen iGPUs (not sure specifically about Barcelo).. But it is a good progress anyway as I wouldn't be able to fix this ever on my own, so I am really glad it is done. Now I will probably get back to the topic and try to patch whatever else is needit and give it to people in a form of rpm package for the time being.. we will see, it is all about time

@MajorP93 said: @florent Thanks! I did not have time (yet) to look into the heap export due to weekend being in between. I will update to current master and provide you with the heap export in the following days. Best regards no problem , the sooner we'll have these exports, the sooner we will be able to indentify what is leaking in your usage, since we already plugged the leaks we reproduced in our labs