Random IO Error Server 2025 Data Center

[dcuadrados]

Hello everyone,

I'm experiencing a random "IO Error" that causes my two Windows Server 2025 Data Center VMs to randomly halt (yellow triangle in Proxmox). A reset/reboot resolves the issue temporarily.

My environment details are below. I suspect a potential conflict with my configuration, possibly related to I/O or the high RAM usage.


Node and Storage



Node: Proxmox VE 9.0.11 on Linux 6.14 kernel.

CPU: Intel Xeon E-2288G (16C).

RAM Usage: High (approx. 89% of 31 GiB).

Storage: ZFS pool built on two 960 GB Samsung NVMe SSDs (S.M.A.R.T. OK, low wearout).

Repo Status: Non production-ready repository enabled.


Windows VM Configuration



Both Windows Server 2025 VMs use the following critical settings:

Setting Value

SCSI Controller VirtIO SCSI single

Disk Image RAW format on ZFS

I/O Settings aio=io_uring, cache=writeback, discard=on, iothread=1, ssd=1

Memory 13 GiB and 6 GiB respectively

Processors Host CPU type

BIOS OVMF (UEFI)

Has anyone encountered this specific IO Error with this configuration (especially VirtIO/ZFS/IO_URING) on recent Proxmox versions?

​

 

[Whatever]

If you use virtio drivers 1.285 check this thread: https://forum.proxmox.com/threads/r...device-system-unresponsive.139160/post-814067

 

[dcuadrados]

If you use virtio drivers 1.285 check this thread: https://forum.proxmox.com/threads/r...device-system-unresponsive.139160/post-814067

Im going to see it, thanks