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Date: Fri, 3 Mar 2000 12:05:38 +0200
From: Vallo Kallaste <vallo@matti.ee>
To: Bruce Evans <bde@zeta.org.au>
Cc: Peter Dufault <dufault@hda.com>, freebsd-current@FreeBSD.ORG
Subject: Re: Crash in currtprio, after dumping no operating system..
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References: <20000303040632.A2942@myhakas.matti.ee> <Pine.BSF.4.21.0003031513550.2455-100000@alphplex.bde.org>
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In-Reply-To: <Pine.BSF.4.21.0003031513550.2455-100000@alphplex.bde.org>; from Bruce Evans on Fri, Mar 03, 2000 at 03:23:17PM +1100
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On Fri, Mar 03, 2000 at 03:23:17PM +1100, Bruce Evans <bde@zeta.org.au> wrote:

> > 8 partitions:
> > #        size   offset    fstype   [fsize bsize bps/cpg]
> >   a:   131072   524288    4.2BSD     1024  8192    16 	# (Cyl.   32*- 40*)
> >   b:   524288        0      swap                    	# (Cyl.    0 - 32*)
> >   c:  8899947        0    unused        0     0       	# (Cyl.    0 - 553*)
> >   e:  8244587   655360     vinum                    	# (Cyl.   40*- 553*)
> 
> The dump fills up precisely the entire 'b' partition.  Since the
> partition begins at offset 0, the dump overwrites the label at sector
> offset 1 and any bootblocks at sector offsets 0-15.  This misconfiguration
> is handled for swapping but not for dumping.
> 
> This shouldn't lose any data.  Just restore the label from a backup and
> write new bootblocks.

Thanks for clarifying, but now I have next question. Why sysinstall
allows such misconfiguration? As I understand now the right way is
start the disk with root partition not swap. The disklabel shown here
was created with 4.0-20000228-CURRENT sysinstall. It seems now I'm wrong
but I always thought the best place for swap is the beginning of disk.
Can you please confirm that the common practise is disklabel with root
partition in the beginning of disk?

Thanks
-- 

Vallo Kallaste
vallo@matti.ee


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