Which Raid?

I was wondering if i could get some input on the colo server i'm building. I'm not sure if i want to go with IDE Raid or Scsi Raid. Will i really notice a major preformance boost if i used the more expensive scsi U160 drives vrs a ATA 66/100 drive? If i was to use scsi it woudl be 18GB drives whiel if i used IDE it woudl eb least 40GB drives. I really don't knwo which i want cheap and lots of space or less space faster. So any suggestions or opinion are welcome. Oh and the Drives will be in Raid 5.

Running on a:
TYAN S2462UNG Dual AMD Socket A mainboard.
2 AMD Athlon MP 1.2Ghz 3D NOW!
1GB DDR PC2100 Registered
4U Rackmount Case

Running Linux 2.4.5
IDE card = 3ware 6800

 

 

 

 

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