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Settle this for me...

Jeff7181

Jeff7181

Lifer
What's faster... the fastest 7200 RPM ATA133 hard drive, or a 15,000 RPM SCSI hard drive? I say the SCSI is faster... this other guys says the ATA133 is faster... I say the IDE bus has potential for more bandwidth than the SCSI, but one hard drive CANNOT saturate the IDE bus, or even come close to it as of now. SCSI seek times are so much lower, it will seem blazingly fast compared to an ATA133. You'd need at least 3 IDE drives in Raid to saturate the IDE bus.

Am I wrong?
 
Depends on which kind of SCSI.

However, if it is a 15k RPM drive your talking SCSI UW 160 most likely or even 320 (btw 160/320 is how many mb/sec the data bus is). Even top end 8mb cashe IDE drives only compare to low end SCSI drives, it's not that they are all that diffrent is just that the interface largely has to do with it. SCSI has integrated controllers and it's own processor and can do calculations without having to goto the CPU, and therefore is just faster.

SCSI has the advantage of speed, seek easily over IDE drives. Also SCSI or IDE no way do they fully utilize the data bus the highest end IDE drives get pretty close to 65-70mb/s while the highest end SCSI gets pretty close to 90mb/s
 
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