Check which SMART features the drive supports and which parameters are set.
$ smartctl -c /dev/rdsk/c0t0d0s0
The drive status and the list of check attributes.
$ smartctl -H /dev/rdsk/c0t0d0s0
$ smartctl -A /dev/rdsk/c0t0d0s0
Run the off-line test
$ smartctl -t offline /dev/rdsk/c0t0d0s0
Check for errors
$ smartctl -l selftest /dev/rdsk/c0t0d0s0
Check in more detail
$ smartctl -r ioctl -i /dev/rdsk/c0t0d0s0
Display the general statistics
$ smartctl -a /dev/rdsk/c0t0d0s0