Thanks for the reply. The dual has *two* ATA busses, one ATA 100 and one ATA 66. My new drive is a WD SE 120, btw. Thanks jeff At 8:51 AM -0800 12/24/02, T. Brown / groucho wrote: >On Tuesday, December 24, 2002, at 08:38 AM, jeff small wrote: > >>I'm installing an additional IDE drive in my dual 1ghz. Does it >>matter which bus it's installed on? I thought I had read somewhere >>that there was a protocol for adding drives; I can't find any >>reference now. >> > >It would be best to put it on the same buss as the original drive. >There is a slight speed hit if you put it on the CD/DVD drive buss. >I do have a drive in the atapi chain, but it is for MP3 / iTunes >storage. The drive is a WD 80 gig special edition >with an 8 meg cache. I notice no speed hit with it for that purpose. >With other drives though, there was a noticeable difference. > > >HTH, >groucho >