Hi, I am not sure what the mechanism is, but it works well, even with one USB lead like you said. All the best Steve _____ From: access-uk@xxxxxxxxxxxxx [mailto:access-uk@xxxxxxxxxxxxx] On Behalf Of Ibrahim Gucukoglu Sent: Saturday 11 July 2009 07:17 To: access-uk@xxxxxxxxxxxxx Subject: [access-uk] CNM external Drive Hi Steve. You mentioned that you had bought one of these drives. How do you find it and what drive mechanism does your drive use? I have a Sony Optiarc for which a firmware update is available to version 1.02 from 1.01 which is already in the drive. I ask because a friend is considering buying one of these for her netbook and I want to make sure I give her the right information. All the best, Ibrahim.