Cannot migrate disk from local-lvm: Input/Output Error with .Conf File


Feb 24, 2019
On my current Proxmox setup, all of the VM hard disks are stored on local-lvm. I've added some additional hard drives, and want to move everything over to that new directory.

When I try to move disks using the GUI, it gets to 100% transferred and then fails with the error
TASK ERROR: storage migration failed; unable to open file '/etc/pve/nodes/pve2/qemu-server/109.conf.tmp.10352' - Input/output error.

I get similar errors when moving any of the VMs; the only thing that is different is the numbers on the end of the conf.tmp file. The disk I'm copying to is mounted to /mnt/raid10. It shows up in the Proxmox GUI as a usable directory, and I can create new VMs using it with no problems--I just can't move any existing disks to it.
What am I missing? Thanks!
To follow up on this: I thought that maybe the permissions had somehow changed on the root user account. I compared this Proxmox install with another working one I have, and the permissions were set identically on the .conf files, so that wasn't the problem.

Out of desperation, I rebooted the server one last time, and everything magically started working. I was able to move all of my existing hard disks from local-lvm to my new hard drives with no problem.


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