ricoh mp7200a (firm.1.30):
Read sample offset correction ...+97
Write samples offset ...+6
Combined read/write sample offset correction ...+103
lite-on hw-160P6s
Read sample offset correction ...+6
Write samples offset ...-6
Combined read/write sample offset correction ...0
http://homepage2.nifty.com/yss/eac/eac.htm
http://www.daefeatures.co.uk/search.php
http://www.accuraterip.com/driveoffsets.htm