Date: Tue, 10 Aug 2010 15:50:12 -0700 From: Bakul Shah <bakul@bitblocks.com> To: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> Cc: geom@freebsd.org, hackers@freebsd.org Subject: Re: Support for WD Advanced Format disks Message-ID: <20100810225012.A8CE35B67@mail.bitblocks.com> In-Reply-To: Your message of "Tue, 10 Aug 2010 23:08:41 %2B0200." <86mxsunpk6.fsf@ds4.des.no> References: <86wrry1hwv.fsf@ds4.des.no> <20100810184853.21FED5B5A@mail.bitblocks.com> <86mxsunpk6.fsf@ds4.des.no>
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After poking around some, it seems ATA/ATAPI-7 Identify Device word 106 bit 13 is set to 1 and bits 0-3 are set to 3 (for 2^3 or 8 LBAs per sector) for a 4KB sector size (pin 7-8 jumper on a WD AF disks presumably changes this setting to 0,0). See page 121 of Atapi-7 volume 1 (google for ata-atapi-7.pdf). Hopefully this helps in whatever `clean solution' you are looking for?
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