Date: Mon, 22 Nov 2004 21:17:07 +0100 From: Gary Jennejohn <garyj@jennejohn.org> To: freebsd-hackers@freebsd.org Subject: Re: List of fake vs. real SATA drives. Message-ID: <200411222017.iAMKH7A6014442@peedub.jennejohn.org> In-Reply-To: Your message of "Mon, 22 Nov 2004 14:19:38 EST." <Pine.OSX.4.61.0411221417120.787@oof.local>
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Charles Sprickman writes: > I don't know how much of it to believe, since it is marketing material,=20 > but the Seagate white paper on their site claims that all the=20 > command-queueing stuff brings the performance very close to that of scsi. > In my experience ATA drives really lack when it comes to seek times and contention, e.g. heavy copying between 2 drives while trying to do normal accesses to one of them. SCSI drives somehow manage to more gracefully handle that sort of thing. Probably a benefit of the Tagged Queuing which they pretty much all support. --- Gary Jennejohn / garyj[at]jennejohn.org gj[at]freebsd.org garyj[at]denx.de
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