Date: Sat, 9 Sep 2006 19:42:48 -0700 From: "jdow" <jdow@earthlink.net> To: <freebsd-questions@freebsd.org> Subject: Re: Origin of hard drive parameters Message-ID: <089001c6d482$d1531d80$0225a8c0@Wednesday> References: <20060909201151.30355.qmail@web32715.mail.mud.yahoo.com>
next in thread | previous in thread | raw e-mail | index | archive | help
From: "stheg olloydson" <stheg_olloydson@yahoo.com>
>
> 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 withdrawn in 2002, X3.298-1996, from t13.org.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 $30.00US versus using possibly
> horribly wrong information. (It is a _working draft_ from 1996,
> after all.)
It's probably cheaper to read the code for the GNU BIOS project
or for things like fdisk. It should be present in both places.
{^_-}
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?089001c6d482$d1531d80$0225a8c0>