Previous test results for /dev/disk0:

smartctl 6.2 (build date Aug  2 2013) [x86_64-apple-darwin10.8.0] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed without error       00%      2720         -
# 2  Short offline       Completed without error       00%      2720         -


Now performing a short test on /dev/disk0 in the background. You can close this window and try again in several minutes. Please see below the smartctl output.

smartctl 6.2 (build date Aug  2 2013) [x86_64-apple-darwin10.8.0] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF OFFLINE IMMEDIATE AND SELF-TEST SECTION ===
Sending command: "Execute SMART Short self-test routine immediately in off-line mode".
Drive command "Execute SMART Short self-test routine immediately in off-line mode" successful.
Testing has begun.
Please wait 2 minutes for test to complete.
Test will complete after Wed May 21 22:29:07 2014

Use smartctl -X to abort test.