I may know why I’ve been having so many iTunes sync issues lately. Disk Utility and Smart Status were fine, but after 18 hours of TechTools Pro Surface Scan I got 398 bad blocks. This is a dead drive. — http://bit.ly/1zayIc4 Posted on December 6, 2014 by jgordon From app.net – http://bit.ly/1zayK3R.