From: David Presotto <presotto@closedmind.org>
To: rgr@sdf.lonestar.org, 9fans@cse.psu.edu
Subject: Re: [9fans] Plan 9 install doesn't put the right MBR on the disk
Date: Tue, 15 Jul 2003 07:16:49 -0400 [thread overview]
Message-ID: <b9a5d4ca77c71769d1b6a9092e3637d9@plan9.bell-labs.com> (raw)
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I tried it on one yesterday and it put a working mbr on it. Perhaps
I did something different. I copied /dev/zeros to the disk before
starting to wipe out what was there.
Is it asking you to install an MBR?
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From: rgr@sdf.lonestar.org (Rob Ristroph)
To: 9fans@cse.psu.edu
Subject: [9fans] Plan 9 install doesn't put the right MBR on the disk
Date: 15 Jul 2003 00:17:43 -0500
Message-ID: <87vfu4mkqw.fsf@rgristroph-austin.ath.cx>
Hi,
The current Plan 9 which you download from Bell Labs is
uninstallable on a clean machine. It doesn't put the Master
Boot Record on the disk during the install process, and
various methods of writing an mbr (from another OS or from a
Plan 9 floppy) make the boot process survive only a split
second longer.
Note that if you currently have a working Plan 9 on the disk,
you have to wipe the MBR to replicate this problem. You can
do this by booting a dos disk and doing fdisk /mbr or with
dd. If you don't, you will install the latest Plan 9 and
it will seem to work fine, but only because the MBR survived
from your previous working setup.
I have replicated this behaviour on two computers of my own,
and even bought a brand new disk because I thought all my
disks might be screwed; and on top of that I went to friend's
house today and convinced him to take down his working Plan 9
and try a fresh install on a clean disk, and replicated it
there also.
--Rob
next reply other threads:[~2003-07-15 11:16 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-15 11:16 David Presotto [this message]
2003-07-15 13:02 ` nofreakingspam
2003-07-15 15:50 ` nofreakingspam
2003-07-15 16:09 ` Dan Cross
2003-07-16 7:57 ` Fco.J.Ballesteros
2003-07-16 13:26 ` nofreakingspam
2003-07-16 15:45 ` Fco.J.Ballesteros
2003-07-16 15:51 ` andrey mirtchovski
-- strict thread matches above, loose matches on Subject: below --
2003-07-15 5:17 Rob Ristroph
2003-07-15 10:38 ` Douglas A. Gwyn
2003-07-15 14:33 ` northern snowfall
2003-07-15 22:14 ` Rob Ristroph
2003-07-15 23:20 ` northern snowfall
2003-07-15 13:07 ` Martin Althoff
2003-07-15 22:30 ` Rob Ristroph
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