Ezer éves bug proxmox-ban(nyilván nem, inkább kvm/qemu bug lehet)
nálam 3.4-s nál is csinálta jó pár éve
Lost Partition Tables on VMs | Proxmox Support Forum
független filerendszertől
jellemzően akkor jön elő amikor túlterhelődik az io
https://forum.proxmox.com/threads/lost-partition-tables-on-vms.44276/ https://forum.proxmox.com/threads/partitions-lost-in-a-qcow2-vm.31573/ https://forum.proxmox.com/threads/solved-disk-without-partitions.63453/ https://forum.proxmox.com/threads/boot-failed-not-a-bootable-disk.56682/ https://forum.proxmox.com/threads/debian-guest-losing-partition-table.27723/ https://forum.proxmox.com/threads/vm-disk-zerst%C3%B6rt-kurz-nach-pbs-backup.86478/ https://forum.proxmox.com/threads/vms-not-working-anymore-after-pve-7-upgrade.93853/ https://forum.proxmox.com/threads/after-backup-boot-failed-not-a-bootable-disk.67954/ https://forum.proxmox.com/threads/after-backup-boot-failed-not-a-bootable-disk.25419/ https://forum.proxmox.com/threads/vm-crashed-possible-to-restore-certain-harddisk.26807/ https://forum.proxmox.com/threads/vm-debian-9-lost-bootable-device-after-apt-update.91731/ https://forum.proxmox.com/threads/after-update-reboot-cant-start-vm-from-2nd-drive.101638/ https://forum.proxmox.com/threads/after-backup-boot-failed-not-a-bootable-disk.25419/post-332320 https://forum.proxmox.com/threads/no-bootable-device-migrierte-server-lassen-sich-nicht-rebooten.56883/ https://forum.proxmox.com/threads/boot-failed-not-a-bootable-disk-after-converting-and-importing-image.56495/ https://forum.proxmox.com/threads/urgent-important-issue-regarding-proxmox-ceph-storage-and-kvm-virtualization.104308/ https://solveforums.msomimaktaba.com/threads/solved-vm-not-a-bootable-disk-after-upgrade-from-promox-6-x-to-7-x.509050/ https://forum.proxmox.com/threads/corrupt-gpt-after-restore-on-pve-7-0-from-backup-on-pve-6-4-qemu-vm-lvm-thin-storage-ovmf.94785/