Fabian, If you do not have a HD caddy you will need to get one you will also need a ribbon and power connection (cable extension and or I connection) if you do not already have them. Gawd it's been so long since I have been in a Duo Dock. >From what I do remember, Hard Drive size is dependent on OS and you can even put in 2 HD's if you like, I did in mine. Any Older SCSI HD will work (meaning most SCSI desktop HD's). I had one 10 gig and 1 20 gig. It's easy to do. But you should be running 7.1 or higher if you have a 280 or 2300 it will be more fun since they can run 8.1. The higher the OS the bigger the HD. Brandy ----- Original Message ----- From: "Fabian Fang" <ftf at mac.com> To: "A place to discuss Apple's sub-portable computers." <duolist at listserver.themacintoshguy.com> Sent: Wednesday, April 12, 2006 5:36 AM Subject: Re: [DuoList] I want to install a SCSI drive in my Duodock - Needof info On Apr 11, 2006, at 11:40 PM, Alex Santos wrote: I have a duodock and have been fishing google for a while trying to find info about the specs for a compatible HD. I don't know the proper height of the drive. I don't know how bug the HD can be - doesn't this depend in the version of the OS? What else do I need to know? If you can provide any piece of information in this regard I should be able to piece things together. If you have a link to a web page or PDF that can contribute, I would be very grateful.