If you are using one of them hard disk cartridges that let you yank the drive from the tower, make sure that it has a fan to cool the 7200 RPM drives, they run a little warm. I'm not sure if the they've made cartrige units for the ultra IDE drives, these disks take 80 conductor ribbon cable. I don't know if the short length of 40 conductors between the cartrige case and the disk interferes with the ultra IDE performance specs.
Some of the disk carriers have a metal subplate, have a teeny fan on board, and do better heat conduction. The older cartridges are only plastic and not as well suited for the newer higher speed drives that run warm. Check out cyberguys.com for their latest offerings in cartridge systems. [This message was edited by Ray Minich on 29 September 2005 at 11:27 PM.]