Date: Tue, 15 Dec 2009 16:44:25 +0200 From: Andriy Gapon <avg@icyb.net.ua> To: Doug Barton <dougb@FreeBSD.org> Cc: freebsd-current@FreeBSD.org Subject: Re: AHCI/ATA_CAM for dummies? Message-ID: <4B27A0C9.4030407@icyb.net.ua> In-Reply-To: <4B26A45B.4020302@FreeBSD.org> References: <d873d5be0912132105p6fea5f74ld0caf2cfe43cd808@mail.gmail.com> <4B25D1ED.5060509@FreeBSD.org> <d873d5be0912132214v4410d087xb14e80ae705312ec@mail.gmail.com> <4B25DA75.5080807@FreeBSD.org> <d873d5be0912132306w542a9706r9e070f10d15856db@mail.gmail.com> <4B25EC42.4090604@FreeBSD.org> <d873d5be0912140013u42a9e410qa3701a45f11e2531@mail.gmail.com> <4B26A45B.4020302@FreeBSD.org>
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on 14/12/2009 22:47 Doug Barton said the following: > I did look up the spec sheet on the hard drive last night, and > although it does mention SATA and NCQ it does not explicitly mention > AHCI. > http://www.hitachigst.com/tech/techlib.nsf/techdocs/50C8DBC2A315A4C786256F400065B756/$file/7K100_SATA_FINAL_DS.pdf > and > http://www.hitachigst.com/tech/techlib.nsf/products/Travelstar_7K100 > if you're interested. > > I also didn't see any mentions of jumpers on the drive to enable AHCI, > which I was kind of hoping for since that's pretty easy to remove. > AHCI stands for Advanced Host Controller Interface, which means that it has to do with an interface that a controller presents to a host OS, not with an interface between the controller and a drive. OTOH, AHCI is applicable only to SATA controllers. The opposite is not true, though, not all SATA controllers are AHCI. -- Andriy Gapon
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