Date: Mon, 6 Dec 2010 21:16:08 +0000 From: Bruce Cran <bruce@cran.org.uk> To: Ivan Voras <ivoras@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, Pawel Jakub Dawidek <pjd@freebsd.org>, John Baldwin <jhb@freebsd.org> Subject: Re: svn commit: r216230 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <20101206211607.GA65110@muon.cran.org.uk> In-Reply-To: <AANLkTi=Bnkq8sR3j7kq-aKzbk0TEd=kFiyr%2BqeQpzXGc@mail.gmail.com> References: <201012061218.oB6CI3oW032770@svn.freebsd.org> <AANLkTine9rGq_cM4ruFXYq=-F7cMXcQAr-zKHuWoQs2z@mail.gmail.com> <20101206195327.GD1936@garage.freebsd.pl> <201012061518.49835.jhb@freebsd.org> <AANLkTi=Bnkq8sR3j7kq-aKzbk0TEd=kFiyr%2BqeQpzXGc@mail.gmail.com>
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On Mon, Dec 06, 2010 at 09:31:39PM +0100, Ivan Voras wrote: > For what it's worth, apparently linux has the concept of "physical" > and "logical" sector sizes (possibly in addition to "stripe size"), > with physical being 4096 and logical 512, for example: > > # hdparm -I /dev/sde | grep size > Logical Sector size: 512 bytes > Physical Sector size: 4096 bytes > device size with M = 1024*1024: 1430799 MBytes > device size with M = 1000*1000: 1500301 MBytes (1500 GB) So do we, except they're both the same for Advanced Format drives: # camcontrol identify /dev/ada1 ... device model WDC WD10EARS-00Z5B1 ... sector size logical 512, physical 512, offset 0 I don't know if Linux has a quirks list that 'corrects' the physical sector size? -- Bruce Cran
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