From owner-freebsd-questions  Wed Nov  1 17:36:54 2000
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Date: Thu, 02 Nov 2000 02:26:54 +0100
From: Siegbert Baude <siegbert.baude@gmx.de>
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To: Aaron Hill <hillaa@hotmail.com>
Cc: questions@freebsd.org
Subject: Re: How to Erase/Zero a Boot Sector?
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Hi Aaron,

> Can someone tell me how to erase (or just zero?) the boot sector of a given
> partition. I know about DOS's fdisk /mbr which kills the master boot record.
> What I want to do is erase the boot sector of a given partition - but leave
> the rest of the partition intact.

dd if=/dev/zero of=/dev/adXsY bs=512 count=1

Note: /dev/zero is different from /dev/null !

> FYI - I'm currently toying with getting a IBM T20 laptop to run fbsd 4.1.1
> Setting the partition to type 131 (extfs2) and fdisk /mbr didn't help.

FreeBSD uses ffs, with type 165 (decimal)!

Ciao
Siegbert


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