Date: Sat, 9 Sep 2006 13:11:51 -0700 (PDT) From: stheg olloydson <stheg_olloydson@yahoo.com> To: freebsd-questions@freebsd.org Cc: ihilt@bluebottle.com, jdow@earthlink.net Subject: Re: Origin of hard drive parameters Message-ID: <20060909201151.30355.qmail@web32715.mail.mud.yahoo.com>
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On 9 Sep 2006 14:54:09 -0000 ihilt wrote: >On Wednesday 06 September 2006 7:54 pm, jdow wrote: > >> >> Ok. Maybe the better question is: in either case, C/H/S or LBA mode, >> >> where are these parameters stored? > >> They flat out are not stored anywhere. There is a standard algorithm >> published by the VESA people, I believe, that provides the data for >> all SCSI drives and modern IDE/ATA/SATA drives. > >Do you know the name of this standard or where I can get it? > >Ian Graeme Hilt Actually, the stardard is created by the T13 Technical Committee of the InterNational Committee for Information Technology Standards (INCITS), formerly the Accredited Standards Committee X3, Information Technology. Its standards are published by ANSI. The one you are looking for is ANSI INCITS 397-2005 AT Attachment - 7 with Packet Interface. You can download a pdf from techstreet.com for $30.00US. Just search for 397-2005. You can also get a free copy of a working draft of a standard withdrawn in 2002, X3.298-1996, from t13.org. While the information you are looking is unlikely to have changed between 1996 and 2005, you are in a better position to weigh the benefit to your project of saving $30.00US versus using possibly horribly wrong information. (It is a _working draft_ from 1996, after all.) HTH, stheg __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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