TrueNAS CORE: Weekly selective S.M.A.R.T. test of 1/4 of all LBAs on all HDDs

smart-selective-test.sh

#!/bin/sh
week=$((($(date +%-d) + 6) / 7))
status=0

if [ "$week" -lt 5 ]
then
	for disk in /dev/ada?
	do
		if [ -e "$disk" ]
		then
			lba=$(($(camcontrol identify "$disk" | grep '^LBA48' | grep -Eo '[0-9]+ sectors' | cut -d ' ' -f 1) / 4))
			smartctl -t "select,$((lba * (week - 1)))-$((lba * week - 1))" "$disk" || status=1
		fi
	done
fi

if [ "$status" -ne 0 ]
then
	echo "ERROR: smartctl failed!" >&2
fi

exit "$status"