Filed both XO related issues: Memory visibility at VM creation: https://github.com/vatesfr/xen-orchestra/issues/10225 domain_crash invisible in XO: https://github.com/vatesfr/xen-orchestra/issues/10226 Linking to this thread as promised earlier, thanks all. Hope this helps someone out.

Just got a failure today but with a different pool. "message": "backup task failed with undefined error", "name": "Error", "stack": "Error: backup task failed with undefined error\n at forwardResult (file:///usr/local/lib/node_modules/xo-server/src/_handleBackupLog.mjs:37:25)\n at handleBackupLog (file:///usr/local/lib/node_modules/xo-server/src/_handleBackupLog.mjs:68:12)\n at onTaskUpdate (file:///usr/local/lib/node_modules/xo-server/src/xo-mixins/metadata-backups.mjs:117:13)\n at onTaskUpdate (file:///usr/local/lib/node_modules/xo-server/node_modules/@xen-orchestra/mixins/Tasks.mjs:205:23)\n at onLogFct (/usr/local/lib/node_modules/xo-server/node_modules/@vates/task/combineEvents.js:61:5)\n at metadataBackup._executor (file:///usr/local/lib/node_modules/xo-server/src/xo-mixins/metadata-backups.mjs:122:11)\n at Jobs.runJob (file:///usr/local/lib/node_modules/xo-server/src/xo-mixins/jobs/index.mjs:297:7)\n at file:///usr/local/lib/node_modules/xo-server/src/api/schedule.mjs:84:9\n at Task.runInside (/usr/local/lib/node_modules/xo-server/node_modules/@vates/task/index.js:204:22)\n at Task.run (/usr/local/lib/node_modules/xo-server/node_modules/@vates/task/index.js:188:20)\n at Xo.runSequence (file:///usr/local/lib/node_modules/xo-server/src/api/schedule.mjs:73:3)\n at Task.runInside (/usr/local/lib/node_modules/xo-server/node_modules/@vates/task/index.js:204:22)\n at Task.run (/usr/local/lib/node_modules/xo-server/node_modules/@vates/task/index.js:188:20)\n at Api.#callApiMethod (file:///usr/local/lib/node_modules/xo-server/src/xo-mixins/api.mjs:475:18)" } } [image: 1785806777819-screenshot_20260803_212536.png]

@jeremie1977 Ah, oui effectivement je n'ai pas testé avec plusieurs disques ! Et j'ai du typo dans la doc, je vais faire une PR pour modifier Je pense que c'est du a la façon d'insérer les disques et les DVD coté XCP-ng. Je vais investiguer !

@msupport said: @acebmxer You need two Disk with 300GB If this is a reply to my initial post. I have already got it installed. Where do you see this 300GB requirement? https://helpcenter.veeam.com/docs/vbr/em/system_requirements.html?ver=13 Disk Selection Logic: When selecting a disk for system and adjacent functions, Veeam Software Appliance automatically chooses an SSD over an HDD, and selects the smaller disk of the two available. The sizing recommendations for Disk 1 below remain valid for the system disk. Disk 1: 240 GB1 minimum. This disk hosts Veeam JeOS, Enterprise Manager Veeam Backup & Replication software, configuration database and instant recovery cache. Recommended sizing depends on the number of protected workloads. Sizing also accounts for configuration database growth as you add more workloads to protect: 480 GB1 SSD for small environments (up to a few hundred workloads). 960 GB1 SSD for medium-sized environments (up to a few thousand workloads). Multi-TB1 SSD for large environments. Larger capacity increases the disk space available to instant recovery cache, allowing for running more machines for longer time. Note: After Veeam Software Appliance deployment, adding new storage devices or resizing existing ones is not supported. Plan your disk capacity carefully before you start the deployment. Disk 2: 240 GB1 minimum. This disk hosts guest file system catalogs and backups, therefore recommended sizing depends on your backup storage needs. Any additional disks found in the system during Veeam Software Appliance deployment will be automatically joined with Disk 2 into the single Logical Volume Manager (LVM) spanned volume. This is only backing a few vms around 10 vms, and actual location is to nfs storage.

Hi! No, but check XO logs/output to see what's going on

@poddingue, that is true, my first post here. I'll try to play with these BIOS settings again. and keep you posted. Cheers

This might have worked, at that time i've allready created new VMs from the information inside the Backup xml file. It worked out allright but building VMs this way, is quite tidious. Maybe there could be a way to find the correct installer and patches, to get a new host in a state to restore a pool backup, would be good.

Drivers are actually in @Team-Hypervisor-Kernel scope nowadays