Dan Langille's Other Diary
He has another, more popular, diary. This one is more general.
R710 – getting the drives ready
smartd: Device: /dev/ada0, 8 Currently unreadable (pending) sectors
smartctl -t long /dev/allthedrives
smartd: ATA error count increased from 0 to 1
smartd: Device: 8 Currently unreadable (pending) sectors