I replied in your XBH thread, I'll copy and paste it in here too.
Also, this is how I have my drive connected.
Running Windows Media Center Edition 2005 (Basically XP Pro SP2 with a Media Center)
I have the drive powered by the Xbox 360 through the 12-pin cable, and the SATA is hooked up to the computer. Both my Xbox 360 and computer are off. I power on my computer only. It doesn't see anything, because the DVD drive technically isn't there (no power). I wait until Windows and all startup programs are completely loaded. I have SATA/RAID drivers for my motherboard already installed. I hit eject on my Xbox 360, the DVD drive ejects and my computer gives me a message that says Drive Connected! I look in My Computer and it shows up as a DVD-ROM drive. I put in the game. It never locks up if I do it that way.
As for the "No Sense" error,
QUOTE
Grim, I have received the "No Sense" error everytime I have sent that command. ISOBuster sees no file system, so I know the drive is unlocked correctly. All of my backups have played perfectly, haven't made a single coaster yet. Now, here's something interesting: if I open up DVDInfoPro and skip the ss extraction and just send the unlock signal, I will still get the "No Sense" error. But, the drive doesn't unlock. I open up ISOBuster and I see the Audio and Video folders. This is also interesting: If I extract the ss from the disc using the four commands, the drive is unlocked. If I completely skip the "unlock" command, all I'm doing is saving myself some time, because the drive is already unlocked after extracting the SS.
So...maybe the "unlock" command isn't even necessary at all. Just extract your ss and then open up ISOBuster.