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From: julian@tfs.com (Julian Elischer)
Subject: Re: disklabel (1.1.5.1), partitions
To: kuku@gilberto.physik.rwth-aachen.de (Christoph P. Kukulies)
Date: Tue, 24 Jan 1995 11:07:44 -0800 (PST)
Cc: freebsd-hackers@freefall.cdrom.com
In-Reply-To: <199501240924.KAA00162@gilberto.physik.rwth-aachen.de> from "Christoph P. Kukulies" at Jan 24, 95 10:24:06 am
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> 
> 
> I had disk problems on 'gil' recently (hopefully solved) - reformatted
> a Fuji M2694S using SCSICNTL.
> 
> I was wondering about the following when disklabeling again:
> 
> dmesg told me:
> 
> 2117025    1819 cyl 15 heads  77 sec
> 
> Using these figures in a disktab entry resulted in a warning saying that
> partitions c,d,e exceeded end of disk. (I made them p[cde]#2117025).
> 
> So I reduced them to what 15 * 77 * 1819 calculates to, namely 2100945
> and disklabel kept silent.
> 
> Did I give away some sectors ?
> 
Unfortunatly yes...
the question is "What do we do with disks with variable geometries..
especially when the disklabel code assumes it is a fixed geometry.

we calculate an 'average' number of setors per track..
but it has to be an integer, and that truncation leads to a bunch of 
unused sectors..

julian

> 
> 
> 
> --Chris  Christoph P. U. Kukulies    kuku@gil.physik.rwth-aachen.de	 
> FreeBSD blues 2.1.0-Development FreeBSD 2.1.0-Development #1:
> Wed Jan 18 10:42:31  1995     kuku@blues:/usr/src/sys/compile/BLUES  i386
>