Environment: - Proxmox VE 9.1.9, kernel 6.17.9-1-pve - TrueNAS 25.10.3 working fine, upgraded to 25.10.4 - VM config: Q35, OVMF (UEFI), VirtIO-SCSI-PCI controller, 8GB RAM, 2 cores (host type) - QEMU version: 10.1.2 (pve-qemu-kvm_10.1.2-7) Problem: After updating to 25.10.4, the system drops t…

Hi, I was missing those lines there, but it did not fix the issue. It made me recheck some settings on the VM and I had vIOMMU: VirtIO and changed it to Default and now it works. Thank you for your time.

25.10.4 (kernel 6.12.91) fails to boot in Proxmox VM - virtio-scsi disk not detected

TrueNAS General

GIEF June 15, 2026, 11:34pm 6

Correct, you do not need vIOMMU when you enable IOMMU on the Proxmox host. So, vIOMMU set to default(none) is the correct choice. Same as my setup. Glad that it is all working!

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TrueNAS 25.10.4 is Now Available

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25.10.4 (kernel 6.12.91) fails to boot in Proxmox VM - virtio-scsi disk not detected

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