zfsonlinux/debian/tree/zfsutils-linux/usr/lib/zfs-linux/scrub

#!/bin/sh -eu

# Scrub all healthy pools that are not already scrubbing.
zpool list -H -o health,name 2>&1 | \
	awk 'BEGIN {FS="\t"} {if ($1 ~ /^ONLINE/) print $2}' | \
while read pool
do
	if ! zpool status "$pool" | grep -q "scrub in progress"
	then
		zpool scrub "$pool"
	fi
done