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From: "Russ Cox" <rsc@swtch.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Parallels/Mac Build 5582 almost works
Date: Mon, 10 Dec 2007 13:52:16 -0500	[thread overview]
Message-ID: <20071210185151.E89781E8C5C@holo.morphisms.net> (raw)
In-Reply-To: <p0624080fc381e5ae13fa@[192.168.0.7]>

erik:
>> 4. If you install the plan9 MBR which claims to be able to read past 2 GB it doesn't seem to be able to find what I put at > 2 GB.
>
> the mbr needs to be installed at the front of the disk.  
> do you mean pbs?  there is a seperate pbslba.

Although the MBR is installed at the front of the disk,
it reads from other locations on the disk (to load the PBS).
The PBS in turn reads 9load.  Both the MBR and the PBS
need to support LBA offsets if you are going to put the
Plan 9 partition far into the disk.  The difference between
the two is that Jim managed to fit *both* CHS and LBA 
into the Plan 9 /386/mbr, but there was no way to fit
both into the PBS (hence the separate /386/pbs and /386/pbslba).

lawrence:
> 1. Gee I really thought the plan9 installer complained 
> that my MBR would not work with a 2 GB FAT32 partition 
> followed by the plan9 partition, and offered to install a 
> new one. My memory could be faulty. I have since 
> switched to a 1 GB FAT32 to work around that.

Installing the Plan 9 MBR should have been able to work
with a Plan 9 partition many GB into the disk.  Without poking
at your system I can't answer why it didn't in your case.

Russ


  parent reply	other threads:[~2007-12-10 18:52 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-12-09  8:12 Lawrence E. Bakst
2007-12-09 12:23 ` erik quanstrom
2007-12-09 18:40   ` Lawrence E. Bakst
2007-12-09 23:50     ` Lyndon Nerenberg
2007-12-10 18:52     ` Russ Cox [this message]
2007-12-10 20:54       ` Lawrence E. Bakst
     [not found]   ` <p0624080fc381e5ae13fa@192.168.0.7>
2007-12-10  0:29     ` David Leimbach
2007-12-10  1:49       ` Lawrence E. Bakst
2007-12-10  4:19 Joshua Wood
2007-12-10 19:38 ` Lyndon Nerenberg

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