Unfortunately the lvm.conf edit does not work at the lxc container
Also the:
blktrace -d /dev/sdc -o - | blkparse -i -
command does not work inside the lxc (does not find the device /dev/sdc)
When I run blktrace at the proxmox host I see the /dev/sdc accessed from kworker , jbd2 and loop0 (???)...