ディスク異常の確認

dmesg | egrep "exception Emask|failed command|Unrecovered read error|I/O error"

参考
http://kledgeb.blogspot.jp/2013/07/ubuntu-6-hdd.html

cat /etc/cron.daily/chkdmesg.sh 
#!/bin/bash
cd `/usr/bin/dirname $0`
dmesg | egrep "exception Emask|failed command|Unrecovered read error|I/O error" || exit 0
dmesg -T | mail -s '[Home Server Disk Error]' example@example.com