Figured this was a good place to ask: I've got 2 HD's in my workstation now which I need to reformat anyway & reinstall. I just added the second drive, and I was thinking about what to use for my primary & which to use as the slave. I have 2 drives: * One ATA 133 Maxtor 740 60 gig drive * One ATA 100 Western Digital 80 gig Special Edition (w/ 8 meg cache.) Here's how I plan to use this: * one 10 gig system partition - only install the OS and anything that doesn't give me a choice * the rest of the drive would be one big partition for all my apps and stuff * put the page file on the second drive (using XP Pro)? The complete other drive will be the MP3 & share directory for my local lan. My thoughts: * the WD is probably the fastest. I have an ATA 133 MB, but I don't think the interface matters * I don't really need more than 40-50 gigs for my application directory, so I could use either as my primary drive * I plan on adding a slimp3 player & share the mp3 directory for my network, so that drive will be in use by other applications Also, I have a RAID card built on my MB (Asus A7V333) For best performance should I put each HD on a separate channel? (I believe you can do that - I think the RAID controller supports 4 different IDE devices). Would that make a difference? Or should I go the traditional Master/slave on the same channel? Thanks - probably going to start rebuilding the system tomorrow.