Per Steve's request, I'm attaching the log created with: udevadm monitor -e >out.log 2>&1 & printf "1,,L,*\n" | sudo sfdisk /dev/vdb kill %1
Per Steve's request, I'm attaching the log created with:
udevadm monitor -e >out.log 2>&1 &
printf "1,,L,*\n" | sudo sfdisk /dev/vdb
kill %1