*BSD News Article 46580


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From: j@uriah.heep.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Low level format ESDI ??
Date: 9 Jul 1995 00:01:55 +0200
Organization: Private FreeBSD site, Dresden.
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Wing Lee <wing@gate.cis-net.ie> wrote:
>Tried to install FreeBSD on a 645MB ESDI attached to an UltraStor
>Ultra-12 ESDI controller.  It basically failed on performing newfs
>encountering i/o error on the way.  The reason I think is to do with
>the bad sectors on the HD.  So the question is: Anybody knows how to
>low level format the ESDI?

With the controller BIOS.  Boot messy DOS, and run something like
``g c800:5'' in the debugger.  The ROM segment address (c800) might
be different, and the offset is `6' for some BIOSes.

After formatting (and marking the bad sectors bad), run bad144 to
initialize BSD's bad sector table from all these unreadable (marked
bad) sectors.

Actually, it's been a couple of years ago that i've got hold of an
ESDI drive for the last time, hope i've been helpful anyway.
-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/
Never trust an operating system you don't have sources for. ;-)