Date: Mon, 26 Jul 2010 10:19:01 +0200 From: Stefan Esser <se@FreeBSD.org> To: freebsd-stable@freebsd.org Subject: Re: gpart -b 34 versus gpart -b 1024 Message-ID: <4C4D44F5.6040603@FreeBSD.org> In-Reply-To: <4c4cdfd7.Jb6syVdaC436gUYp%perryh@pluto.rain.com> References: <4C4BA50B.6050507@langille.org> <4C4BB672.3090109@langille.org> <AANLkTinKEBb5S9REK3nn8GF3U=jRAtYMBBfsC5TB8Xj4@mail.gmail.com> <AANLkTi=RGe7ygDYpF2u3BN4oPYSgyUUijOuLnz2q=XXY@mail.gmail.com> <AANLkTimpeKJhqtihuOFwU%2BtQZeCVXy0-fbYUsoGgN%2BeF@mail.gmail.com> <alpine.BSF.2.00.1007251349370.3572@woozle.rinet.ru> <4c4cdfd7.Jb6syVdaC436gUYp%perryh@pluto.rain.com>
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Am 26.07.2010 03:07, schrieb perryh@pluto.rain.com: > Dmitry Morozovsky <marck@rinet.ru> wrote: >> ... sector numbers (in CHS address method) >> [start] at 1 (which always suprized me ;) > > This goes back at least as far as soft-sectored 8" diskettes > in the CP/M era. > > IIRC, physical sector 0 of each track contained the C number, > possibly the H, and a list of the remaining sectors on the track > including the size of each sector -- even within a single track > the sectors did not all have to be the same size. This is extremely off-topic, and therefor, I´ll only say, that the above is not true for 8" diskettes nor for CP/M. I can only guess, that there is a track 0 and not a sector with that number because the first track was reserved for system internal use (e.g. held at least the CCP in case of CP/M). I´m quite sure, that FDCs generally supported sector numbers from 0 to 254 (with 255 reserved as a wildcard in certain commands). But this is all really off-topic ... Regards, STefan
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