From: bitbucket@arcor.de
To: The development of GRUB 2 <grub-devel@gnu.org>
Subject: Re: Sendkey patch
Date: Wed, 3 Sep 2008 12:37:40 +0200 [thread overview]
Message-ID: <200809031237.40465.bitbucket@arcor.de> (raw)
In-Reply-To: <1220403254.23879.81.camel@localhost>
On Wednesday 03 September 2008, Javier Martín wrote:
> El mié, 03-09-2008 a las 02:08 +0200, phcoder escribió:
> > Hello, again.
> >
> > Javier Martín wrote:
> > > We have 63 sectors = 32256 bytes (sectors range from 0 to 63 and the
> > > first is used by the MBR).
> >
> > I've just rechecked on my system. My first partition begins at sector
> > number 63. This is the value I've seen at most systems. So last usable
> > sector is 62. Sector 0 is MBR. So we have 62 sectors
>
> Oops, true! How strange. So there was no sector 63 in the CHS model and
> that is why the first sector of cyl 1 (the start of the first partition)
> is LBA 63... Does anyone know the historical reasons for this?
Well, the point is, in CHS addressing sector numbering starts with 1, not 0,
and since there are only 6 bits available for the sector number (the other 2
being used for cylinder number bits #8 and #9), the maximum number of sectors
per track in CHS in 63.
Regards,
Niels
next prev parent reply other threads:[~2008-09-03 10:37 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-02 14:23 Sendkey patch phcoder
2008-09-02 14:54 ` Javier Martín
2008-09-02 15:58 ` phcoder
2008-09-02 16:12 ` phcoder
2008-09-02 16:19 ` Vesa Jääskeläinen
2008-09-02 19:01 ` phcoder
2008-09-02 19:29 ` Vesa Jääskeläinen
2008-09-02 16:30 ` Javier Martín
2008-09-02 18:39 ` phcoder
2008-09-02 20:10 ` Javier Martín
2008-09-02 22:22 ` phcoder
2008-09-02 23:38 ` Javier Martín
2008-09-03 0:08 ` phcoder
2008-09-03 0:54 ` Javier Martín
2008-09-03 9:10 ` phcoder
2008-09-03 11:19 ` Javier Martín
2008-09-03 10:37 ` bitbucket [this message]
2008-09-03 7:07 ` Felix Zielcke
2008-09-03 17:07 ` Vesa Jääskeläinen
2008-09-03 17:23 ` Javier Martín
2008-09-03 17:25 ` Felix Zielcke
2008-09-03 17:48 ` phcoder
2008-09-03 17:53 ` Vesa Jääskeläinen
2008-09-03 18:11 ` phcoder
2008-09-04 22:16 ` Javier Martín
2008-09-05 16:13 ` [PATCH] Move kern/loader.c to boot.mod and add preboot_support (was Re: Sendkey patch) phcoder
2008-09-05 16:47 ` Javier Martín
2008-09-08 19:48 ` Vesa Jääskeläinen
2008-09-08 20:11 ` Javier Martín
2008-09-08 20:25 ` Vesa Jääskeläinen
2008-09-08 20:59 ` Javier Martín
2008-12-15 13:54 ` phcoder
2008-12-15 16:41 ` Vesa Jääskeläinen
2008-12-16 14:34 ` phcoder
2009-02-07 19:26 ` Robert Millan
2009-02-07 19:30 ` Robert Millan
2009-02-07 23:02 ` phcoder
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