Business Application Performance - SCSI Hard Disk
By disabling the L2 cache I was able to emphasize the performance effects of the main memory. But I also thought it would be interesting to remove the onboard IDE controller from the picture also. I installed an Adaptec 2940UW SCSI adaptor and an IBM DVGS 9 GB 10,000 RPM SCSI drive into each platform. I wanted to put each platform at an equal level in the disk subsystem category. Doing this would rule out and mischievous IDE bus-mastering driver benchmarking tweaks. I figured this would also point out if any one of the platforms were lagging due to their IDE interface implementation.
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