Date: Sun, 26 Jun 2005 23:15:20 -0400 From: David Magda <dmagda@ee.ryerson.ca> To: "Marc G. Fournier" <scrappy@hub.org> Cc: freebsd-stable@freebsd.org Subject: Re: SATA vs SCSI ... Message-ID: <3281130fd3a587b4a88a627ae305cb86@ee.ryerson.ca> In-Reply-To: <20050626233114.G57847@ganymede.hub.org> References: <20050626233114.G57847@ganymede.hub.org>
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On Jun 26, 2005, at 22:34, Marc G. Fournier wrote: > In fact, looking at the SATA 2.x specs, each chanell there is rated at > 300MB/s, which, again, if I could 'max out evenly', could seriously > blow away the SCSI bus itself ... > > *If* I'm reading this right ... ? Bus speed does not equal drive speed. And while yes, SATA is now approaching SCSI in bus speed, it doesn't mean that SCSI isn't standing still. A 640 MB/s bus was standardized in 2003 (though SATA is planned to go to 600MB/s in 2007): http://en.wikipedia.org/wiki/SCSI#Ultra-640 This has been hashed out many times over the years in comp.periph.scsi (it used to be IDE versus SCSI, not it's (S)ATA versus SCSI). A search through the archives would probably return many results. The SCSI FAQ [1] would also probably be useful. Specifically the questions: QUESTION: What are the pros and cons regarding SCSI vs IDE/ATA ? http://home.comcast.net/~SCSIguy/SCSI_FAQ/scsifaq.html#_Hlk407004722 QUESTION:Should I spend the extra money on SCSI or just get IDE? http://home.comcast.net/~SCSIguy/SCSI_FAQ/scsifaq.html#_Hlk407091459 QUESTION:Why do SCSI disks cost so much more than IDE/ATA disks? http://home.comcast.net/~SCSIguy/SCSI_FAQ/scsifaq.html#_SCSI_Cost002 [1] http://www.scsifaq.org/
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