From owner-freebsd-hackers  Wed Mar 27 04:50:37 1996
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To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
cc: hackers@freefall.freebsd.org, gibbs@freebsd.org
Subject: Re: Can't read this stupid DAT tape - ARGH! 
In-reply-to: Your message of "Wed, 27 Mar 1996 00:07:20 +0100."
             <199603262307.AAA16445@uriah.heep.sax.de> 
Date: Wed, 27 Mar 1996 04:50:03 -0800
Message-ID: <330.827931003@time.cdrom.com>
From: "Jordan K. Hubbard" <jkh@time.cdrom.com>
Sender: owner-hackers@freebsd.org
X-Loop: FreeBSD.org
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> Are you sure your DAT drive is able to read 256K blocks at all?
> 
> Does ``mt blocksize 0'' and ``dd if=/dev/rst0 ibs=256k ...'' work?

Nope!

> j@uriah 268% fgrep MAXPHYS /usr/include/machine/*
> /usr/include/machine/param.h:#define MAXPHYS            (64 * 1024)     /* ma
x raw I/O transfer size */
> 
> I think you gotta bump this one to 256 K, and recompile your world.

Just for grins, I tried this.  ``panic: double fault'' right upon
invoking init.. :-)

					Jordan