Date: Tue, 28 Jun 2005 13:30:21 -0700 (PDT) From: Don Lewis <truckman@FreeBSD.org> To: dmagda@ee.ryerson.ca Cc: freebsd-stable@FreeBSD.org Subject: Re: SATA vs SCSI ... Message-ID: <200506282030.j5SKULVI079168@gw.catspoiler.org> In-Reply-To: <3281130fd3a587b4a88a627ae305cb86@ee.ryerson.ca>
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On 26 Jun, David Magda wrote: > > 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 There's also Serial Attached SCSI (SAS), which shares uses the same connector and cable as SATA, and has the same data transfer rate. Dunno if we support any SAS HBAs yet. There are a few drives available, but they seem to be pricey. Dunno if FreeBSD supports any SAS HBAs ...
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