Date: Fri, 9 Apr 2010 15:33:55 +0400 From: Alexey Tarasov <me@lexasoft.ru> To: Andriy Gapon <avg@icyb.net.ua>, freebsd-current@freebsd.org Cc: Alexey Tarasov <me@lexasoft.ru> Subject: Re: gpart and sector size Message-ID: <5D7D5FDB-8BF7-4FE6-919A-5C5E7B8784F5@lexasoft.ru> In-Reply-To: <4BBF1033.5030409@icyb.net.ua> References: <1A417529-F467-4411-970A-3FF41080AC61@lexasoft.ru> <868w8yukuy.fsf@ds4.des.no> <6313EB8E-D3DA-459F-A372-0E871359FA1C@lexasoft.ru> <86zl1et4rv.fsf@ds4.des.no> <F2541C05-A42C-486F-9709-56315C2F49FF@lexasoft.ru> <86mxxet437.fsf@ds4.des.no> <F3A5CE7A-894E-4A4C-80DB-7D418E66FA91@lexasoft.ru> <86eiiqt3kp.fsf@ds4.des.no> <846676C4-C1B8-44DB-AA01-B664614DE59F@lexasoft.ru> <20100408172421.62d73a90@ernst.jennejohn.org> <4BBDF7D3.3050300@andric.com> <AE6BA21B-243B-4A6D-A5B1-B8ACC1AFBC9E@lexasoft.ru> <4BBE4032.3030806@andric.com> <539094C7-278A-4674-8A06-E8BAF8F29E58@lexasoft.ru> <4BBF0D36.8050900@icyb.net.ua> <BB50E197-6593-48AE-8A19-A334634EB5F7@lexasoft.ru> <4BBF1033.5030409@icyb.net.ua>
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On 09.04.2010, at 15:32, Andriy Gapon wrote: > on 09/04/2010 14:27 Alexey Tarasov said the following: >>> Or the disk doesn't actually report 4096 anywhere anyhow... Have = you >>> considered that? If yes, can you verify using any tools of any OS = that the >>> disk reports 4K in any way? >>=20 >> In the previous discussion we found that the disk reports 512 sector = size, but >> there are additional ATA commands to determine if it has real sector = size >> larger than 4k. I will try to confirm this. >=20 > Thank you. I think that this would be an interesting detail. >=20 Here is the reference: http://www.wdc.com/wdproducts/library/WhitePapers/ENG/2579-771430.pdf > References > The ATA8-ACS and SBC-3 standards have provisions for a disk drive to = report Advanced Format sector sizes and other performance optimization = information. These standards are used for SATA, SAS, USB, and IEEE 1394 = based interface technologies. -- Alexey Tarasov (\__/)=20 (=3D'.'=3D)=20 E[: | | | | :]=D0=97=20 (")_(")
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