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Date: Mon, 26 Feb 2001 11:22:32 -0700
From: "Jeff V. Merkey" <jmerkey@vger.timpanogas.org>
To: Andre Hedrick <andre@linux-ide.org>
Cc: "Jeff V. Merkey" <jmerkey@timpanogas.org>,
        Guest section DW <dwguest@win.tue.nl>,
        Andreas Jellinghaus <aj@dungeon.inka.de>, linux-kernel@vger.kernel.org
Subject: Re: partition table: chs question
Message-ID: <20010226112232.B23495@vger.timpanogas.org>
In-Reply-To: <002201c09f87$5ce75640$f6976dcf@nwfs> <Pine.LNX.4.10.10102251757550.27588-100000@master.linux-ide.org>
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In-Reply-To: <Pine.LNX.4.10.10102251757550.27588-100000@master.linux-ide.org>; from andre@linux-ide.org on Sun, Feb 25, 2001 at 05:59:33PM -0800
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On Sun, Feb 25, 2001 at 05:59:33PM -0800, Andre Hedrick wrote:
> 
> 
> It does not matter because the usage of CHS will dies soon because it was
> voted to death in Austin last week.  There will only be LBA addressing
> from now on out.

If someone has Linux and NetWare dual booted on a system, and does not 
fill out the CHS fields properly for NetWare partitions, When NetWare 
boots, it will wipe the partition table (it will ask you first) and 
will not recognize any of the partitions.  It does this because if it 
sees CHS values it does not expect, it assumes the partition table 
has been corrupted.

Jeff


> 
> On Sun, 25 Feb 2001, Jeff V. Merkey wrote:
> 
> > 
> > Please also check vger.timpanogas.org/nwfs/nwfs.tar.gz:disk.c for NetWare
> > specific calculations of the CHS values, a different method is used for
> > NetWare partitions vs. everything else (Novell just had to be different).
> > If you do not  use their methods on NetWare partitions, NetWare will not
> > recognize the partition entries correctly, and will attempt to reinitialize
> > the entire partition table on a system if they are wrong (Ouch!).  NetWare
> > does a different calculation for conversion of cylinder values above 1024.
> > 
> > Jeff
> > 
> > 
> > ----- Original Message -----
> > From: "Guest section DW" <dwguest@win.tue.nl>
> > To: "Andreas Jellinghaus" <aj@dungeon.inka.de>;
> > <linux-kernel@vger.kernel.org>
> > Sent: Sunday, February 25, 2001 2:47 PM
> > Subject: Re: partition table: chs question
> > 
> > 
> > > On Sun, Feb 25, 2001 at 04:35:34PM +0100, Andreas Jellinghaus wrote:
> > >
> > > > for partitions not in the first 8gb of a harddisk, what
> > > > should the c/h/s start and end value be ?
> > > >
> > > > most fdisks seem to set start and end to 255/63/1023.
> > > > but partition magic creates partitions with start set to
> > > > 0/1/1023 and end set to 255/63/1023, and detects a problem
> > > > if start is set to 255/63/1023.
> > > >
> > > > so, how should a partition table look like ?
> > >
> > > Since these values will never be used you can imagine that they
> > > are not of great interest. Do whatever you like.
> > > -
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> > 
> > -
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> > 
> 
> Andre Hedrick
> Linux ATA Development
> ASL Kernel Development
> -----------------------------------------------------------------------------
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