Hello the “disk I/O error” is misleading, it’s actually a raft replication issue, most probably related to the same problem of:
and
https://github.com/lxc/lxd/issues/4548
I’m most probably going to provide some mitigation of this issue today, so it should get committed soonish and released to users later on. Until then, the “lxc list” is going to be subject to this kind of glitches.