# /opt/smartmontools/5.40/sbin/smartctl -d 3ware,3 /dev/twl0 --log=xselftest

smartctl 5.40 2010-06-14 r3121 [x86_64-unknown-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce Allen, http://smartmontools.sourceforge.net

=== START OF READ SMART DATA SECTION ===
General Purpose Logging (GPL) feature set supported
SMART Extended Self-test Log Version: 1 (1 sectors)
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Extended offline    Completed without error       00%       399         -
# 2  Extended offline    Completed without error       00%        57         -
# 3  Extended offline    Completed without error       00%        24         -