At 01:28 09/25/2005 -0700, Todd Walton wrote: >On 9/24/05, Gus Wirth <[EMAIL PROTECTED]> wrote: >> The seek time is determined by several factors. One is the servo loop that >> places the heads on the tracks. The ability of the head to position itself >> on the track with minimal settling time depends on the head mass, the >> driving force of the servo, the damping factors, the size of the track, and >> the feedback sensor that measures where the head is on the track. SCSI has >> a superior set of servo controls compared to ATA drives. > >That doesn't make much sense. Why would the internal workings of the >hard drive be determined by the external bus used? This is probably >one of those market things.
The choice of external bus doesn't have a direct connection to the internals of the device. However, the market for ATA drives are mostly comsumer level and the driving factor there is storage capacity. SCSI drives have historically been directed at the server market where performance and reliability have been able to command a premium price. This is starting to change with SATA (Serial ATA). For example, the Western Digital Raptor series is essentially their 10K rpm SCSI drive with a SATA bus interface. So you can get your choice of storage capacity or performance/reliability on the same inteface. Gus -- [email protected] http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
