membus/cpu bandwidth bottleneck

With a very fast disk storage the membus and cpu bandwidth will become a serious bottleneck for the range of applications that cannot take advantage of the kernel cache.

For example if you run `hdparm -T /dev/hda' you will see the maximum bandwidth that the buffer cache can sustain on your machine. That can get quite close to the actual bandwidth provided by an high end scsi array. It will range between 100/200 Mbytes/sec on recent machines.