I'd NEVER suggest sharing BOTH SCSI and IDE for long. I use a DVD IDE drive for a few hours if needed then unplug it.
Why have the CPU and MOBO running any devices when the SCSI stuff is being so fast and reliable.
Space...yeah I know its expensive.....but surely thats down to keeping your HDD space situ tidy
I mean, do you REALLY need to have your HDD FULL to its 100gig size on TWO of them?
Surely thats what CD burners are for...storage? I mean..how long does it take to scan disk and defrag those 100 gig drives every week?
and yes...I do defrag once a week
I have always managed with less than 30 gig total....always...and its never even close to full.