This is one of the commands (this time completely) I suspect beeing responsible for a lot of the writes.
Code:
Command of process 16927 - /usr/bin/qemu-system-x86_64 -name guest=1_homeassistant,debug-threads=on -S -object {"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain-2-1_homeassistant/master-key.aes"} -blockdev {"driver":"file","filename":"/usr/share/OVMF/OVMF_CODE.fd","node-name":"libvirt-pflash0-st...
/usr/bin/qemu-system-x86_64 -name guest=1_homeassistant,debug-threads=on -S -object {"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain-2-1_homeassistant/master-key.aes"} -blockdev
{"driver":"file","filename":"/usr/share/OVMF/OVMF_CODE.fd","node-name":"libvirt-pflash0-storage","auto-read-only":true,"discard":"unmap"} -blockdev {"node-name":"libvirt-pflash0-format","read-only":true,"driver":"raw","file":"libvirt-pflash0-storage"} -blockdev
{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/1_homeassistant_VARS.fd","node-name":"libvirt-pflash1-storage","auto-read-only":true,"discard":"unmap"} -blockdev {"node-name":"libvirt-pflash1-format","read-only":false,"driver":"raw","file":"libvirt-pflash1-storage"} -machine
pc-i440fx-7.2,usb=off,dump-guest-core=off,memory-backend=pc.ram,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format -accel kvm -cpu host,migratable=on,host-cache-info=on,l3-cache=off -m 2048 -object {"qom-type":"memory-backend-ram","id":"pc.ram","size":2147483648} -overcommit mem-lock=off -smp
4,sockets=1,dies=1,cores=2,threads=2 -uuid be41d0ff-481a-4844-8daf-e6e107a3df32 -no-user-config -nodefaults -chardev socket,id=charmonitor,fd=35,server=on,wait=off -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime -no-shutdown -boot strict=on -device {"driver":"nec-usb-xhci","id":"usb","bus":"pci.0","addr":"0x4"}
-device {"driver":"virtio-serial-pci","id":"virtio-serial0","bus":"pci.0","addr":"0x5"} -blockdev {"driver":"host_device","filename":"/dev/zvol/mars/homeassistant","aio":"threads","node-name":"libvirt-1-storage","cache":{"direct":true,"no-flush":false},"auto-read-only":true,"discard":"unmap"} -blockdev
{"node-name":"libvirt-1-format","read-only":false,"cache":{"direct":true,"no-flush":false},"driver":"raw","file":"libvirt-1-storage"} -device {"driver":"virtio-blk-pci","bus":"pci.0","addr":"0x6","drive":"libvirt-1-format","id":"virtio-disk0","bootindex":1,"write-cache":"on"} -netdev
{"type":"tap","fd":"37","vhost":true,"vhostfd":"39","id":"hostnet0"} -device {"driver":"virtio-net-pci","netdev":"hostnet0","id":"net0","mac":"00:a0:98:4e:6e:1e","bus":"pci.0","addr":"0x3"} -chardev pty,id=charserial0 -device {"driver":"isa-serial","chardev":"charserial0","id":"serial0","index":0} -chardev
spicevmc,id=charchannel0,name=vdagent -device {"driver":"virtserialport","bus":"virtio-serial0.0","nr":1,"chardev":"charchannel0","id":"channel0","name":"com.redhat.spice.0"} -chardev socket,id=charchannel1,fd=34,server=on,wait=off -device
{"driver":"virtserialport","bus":"virtio-serial0.0","nr":2,"chardev":"charchannel1","id":"channel1","name":"org.qemu.guest_agent.0"} -device {"driver":"usb-tablet","id":"input0","bus":"usb.0","port":"4"} -audiodev {"id":"audio1","driver":"spice"} -spice port=5900,addr=0.0.0.0,seamless-migration=on -device
{"driver":"qxl-vga","id":"video0","max_outputs":1,"ram_size":67108864,"vram_size":67108864,"vram64_size_mb":0,"vgamem_mb":16,"xres":1024,"yres":768,"bus":"pci.0","addr":"0x2"} -device {"driver":"usb-host","hostdevice":"/dev/bus/usb/002/005","id":"hostdev0","bus":"usb.0","port":"1"} -device
{"driver":"usb-host","hostdevice":"/dev/bus/usb/002/061","id":"hostdev1","bus":"usb.0","port":"2"} -device {"driver":"usb-host","hostdevice":"/dev/bus/usb/002/064","id":"hostdev2","bus":"usb.0","port":"3"} -device {"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0x7"} -sandbox
on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny -msg timestamp=on
I can't make out what exactly here is triggering the writes.
Would the ~ 230 KiB be a reasonable amount of writes for the boot pool without the dataset?
I don't want to hijack the thread, I could create a separate one but I guess it's somewhat related to OPs problem?