I never said the SCSI interface was faster than SATA. There is NO RPM myth. Latency and bandwidth are different and affect performance in different ways (eg. video editing requires bandwidth, while databases need low latency). No changes in the interface (SCSI/ATA/etc) or bus will affect latency as much as an RPM improvement - a 7200RPM drive will never have as low latency as a 15000RPM drive, no matter what interface or bus used. Note that we're only talking about the latency aspect of performance right now as this is the most relevant with high performance database/web applications.

Adrian