Kernel 5.15.39-2-pve PVE Cannot Read ISO file


New Member
Jul 31, 2022
Hi I am running Proxmox 7.2 inside Virtualbox istalled in Ubuntu 22.04.ins

Just updated a kernel to 5.15.39-2-pve and PVE started to throw the error
kvm: -drive file=/proxmox-ve/template/iso/AlmaLinux-9.0-x86_64-dvd.iso,if=none,id=drive-ide2,media=cdrom,aio=io_uring:
Could not read image for determining its format: Operation not supported
TASK ERROR: start failed: QEMU exited with code 1

proxmox-ve: 7.2-1 (running kernel: 5.15.39-2-pve)
pve-manager: 7.2-7 (running version: 7.2-7/d0dd0e85)
pve-kernel-5.15: 7.2-7
pve-kernel-helper: 7.2-7
pve-kernel-5.15.39-2-pve: 5.15.39-2
pve-kernel-5.15.30-2-pve: 5.15.30-3
ceph-fuse: 16.2.9-pve1
corosync: 3.1.5-pve2
criu: 3.15-1+pve-1
glusterfs-client: 9.2-1
ifupdown2: 3.1.0-1+pmx3
ksm-control-daemon: 1.4-1
libjs-extjs: 7.0.0-1
libknet1: 1.24-pve1
libproxmox-acme-perl: 1.4.2
libproxmox-backup-qemu0: 1.3.1-1
libpve-access-control: 7.2-4
libpve-apiclient-perl: 3.2-1
libpve-common-perl: 7.2-2
libpve-guest-common-perl: 4.1-2
libpve-http-server-perl: 4.1-3
libpve-storage-perl: 7.2-7
libspice-server1: 0.14.3-2.1
lxc-pve: 5.0.0-3
lxcfs: 4.0.12-pve1
novnc-pve: 1.3.0-3
proxmox-backup-client: 2.2.5-1
proxmox-backup-file-restore: 2.2.5-1
proxmox-mini-journalreader: 1.3-1
proxmox-widget-toolkit: 3.5.1
pve-cluster: 7.2-2
pve-container: 4.2-2
pve-docs: 7.2-2
pve-edk2-firmware: 3.20210831-2
pve-firewall: 4.2-5
pve-firmware: 3.5-1
pve-ha-manager: 3.4.0
pve-i18n: 2.7-2
pve-qemu-kvm: 6.2.0-11
pve-xtermjs: 4.16.0-1
qemu-server: 7.2-3
smartmontools: 7.2-pve3
spiceterm: 3.2-2
swtpm: 0.7.1~bpo11+1
vncterm: 1.7-1
zfsutils-linux: 2.1.5-pve1

The other kernel 5.15.30-2-pve does not produce such issues, however I am unable to install VMTools properly in this case for some reason, and VM is slow there.

Please kindly advise.
Last edited:


Proxmox Staff Member
Staff member
Aug 1, 2019
what kind of filesystem is mounted there? What is the output of the following?
stat /proxmox-ve/template/iso/AlmaLinux-9.0-x86_64-dvd.iso
qemu-img info /proxmox-ve/template/iso/AlmaLinux-9.0-x86_64-dvd.iso
If the second command also throws the above error, please also attach the output of
strace qemu-img info /proxmox-ve/template/iso/AlmaLinux-9.0-x86_64-dvd.iso


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