A friend has been having problems with his new 250GB harddrive. Prior to any of his problems, he had two identical 80GB 2mb cache harddrives on the same IDE chain. One as master, the other as slave. He used to be able to import video from one harddrive to the other without problems. Now he's installed a new 250GB 8mb cache harddrive as a slave and videos imported onto it are now skipping frames every few seconds. What I'm wondering is, does the way IDE communicates with devices on the same chain cause his problems? I'm not entirely sure about the way IDE communicates between devices, its my assumption that you generally want the faster better performing device on the master setting and the slower device as the slave. Things like having a CD rom would be bad to throw on the same IDE channel as a Harddrive are bad because CD roms are inherently slower, thus driving the speed of information down with the speed of the slower device correct? If thats true, are there disadvantages to putting identical devices on the same IDE chain? Would reading and writing to and from both cause any slowdowns as well? Any information about this would be really enlightening since the way IDE works has been bugging me for awhile as well.