From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Sat, 28 Jul 2012 10:19:00 +0200
From: David du Colombier <0intro@gmail.com>
To: 9fans@9fans.net
Message-ID: <20120728101900.7dc2f9a1@gmail.com>
In-Reply-To: <6CA24E8A-3735-483D-9CF7-1118154C7986@ar.aichi-u.ac.jp>
References: <6CA24E8A-3735-483D-9CF7-1118154C7986@ar.aichi-u.ac.jp>
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Subject: Re: [9fans] 9pccpu: can't open /dev/sdXX/nvram
Topicbox-Message-UUID: a64827a0-ead7-11e9-9d60-3106f5b1d025

> Has anyone succeeded in booting cpu server from usbdisk?

There is no problem in booting the CPU server, since
you can always specify the required values by hand
during the boot.
You problem is that you can't read/write theses
values from/to the disk.

I suppose you're using the USB image I am providing
on 9legacy.org. A nvram partition is present, but
I haven't properly configured the plan9.ini to use
an nvram on the USB disk.

You can simply mount the first FAT partition
from the USB disk, edit the plan9.ini and add
the "readparts=" parameter in the [common] section,
just before the "nvram=" parameter, like this:

readparts=
nvram=/dev/sdXX/nvram

If you are curious how this USB image was built,
you can look at the mkusbboot(8) script provided
in the Plan 9 distribution, or check my notes
available on:

http://www.9legacy.org/9legacy/doc/fossil/usb

There is nothing specific here. Everything is
already provided in Plan 9 from Bell Labs.

--
David du Colombier