Btrfs scrub cronjob with logs from systemd's journalctl

btrfs-scrub.sh

#!/bin/sh

# also see http://marc.merlins.org/perso/btrfs/post_2014-03-19_Btrfs-Tips_-Btrfs-Scrub-and-Btrfs-Filesystem-Repair.html

for fs in $(grep ' btrfs ' /proc/mounts | cut -d' ' -f1 | sort -u)
do
  starttime="$(date "+%Y-%m-%d %H:%M:%S")"
  logger "Starting btrfs scrub on $fs"
  btrfs scrub start -Bd "$fs"
  journalctl -q -k --since "$starttime" | grep BTRFS
  logger "Scrub for $fs has finished"
done