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Date:      Wed, 21 Feb 2001 20:56:02 -0800
From:      Kris Kennaway <kris@obsecurity.org>
To:        Ian Dowse <iedowse@maths.tcd.ie>
Cc:        Andrew Hesford <ajh3@hecubus.bsdonline.org>, Sean Kelly <smkelly@zombie.org>, freebsd-stable@FreeBSD.ORG
Subject:   Re: compress bootdisk
Message-ID:  <20010221205602.B66731@mollari.cthul.hu>
In-Reply-To: <200102211623.aa66094@salmon.maths.tcd.ie>; from iedowse@maths.tcd.ie on Wed, Feb 21, 2001 at 04:23:11PM %2B0000
References:  <20010221095405.A42156@cec.wustl.edu> <200102211623.aa66094@salmon.maths.tcd.ie>

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On Wed, Feb 21, 2001 at 04:23:11PM +0000, Ian Dowse wrote:
> In message <20010221095405.A42156@cec.wustl.edu>, Andrew Hesford writes:
>=20
> >kgzip sounds promising, though. What do I need to do, just `disklabel
> >-Brw` the diskette, newfs it, and dump a kernel.gz in the root
> >directory?
>=20
> Yes, sorry, I missed the disklabel step:
>=20
> 	disklabel -Brw /dev/fd0 fd1440
> 	newfs /dev/fd0
> 	mount /dev/fd0 /mnt
> 	cp kernel.kgz /mnt/kernel
> 	umount /mnt
>=20
> It is also possible to increase slightly the amount of space available
> by reducing the number of inodes. Newfs defaults to allocating one
> inode for every 2k of disk space on the floppy, but this can be changed
> with the -i option. For a boot floppy containing just a few files,
> one inode per 100k of data would be more than enough:
>=20
> 	newfs -i 100000 /dev/fd0
>=20
> This gives you another 50k or so of space for the kernel.

Beware that things like top, ps, and friends break when you don't load
the kernel through the loader -- see the entry in the FAQ about 'nlist
failed' or similar.  I believe this is still true for uncompressed
kernels, so I assume the same holds for kgzipped kernels.

Kris

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