[Sugar-devel] Unbootable machine

[Bernie Innocenti]

El Sat, 29-08-2009 a las 15:17 +0200, Jonas Smedegaard escribió:
> BTW, are all these details about USB booting being collected somewhere 
> on a wiki page?

it would be great if someone could expand this paragraph:

  http://wiki.sugarlabs.org/go/Soas#Boot

This page is not even linked from it:

  http://wiki.sugarlabs.org/go/Sugar_on_a_Stick/USB_format


A few months ago, I got this useful piece of information which makes a
lot of previously unbootable machines work:

--------- Mensaje reenviado --------
De: H. Peter Anvin <hpa at zytor.com>
Para: Bernie Innocenti <bernie at codewiz.org>
Cc: syslinux at zytor.com, Jeremy Katz <katzj at redhat.com>, Development
discussions related to Fedora Core <fedora-devel-list at redhat.com>, Sugar
Devel <sugar-devel at lists.sugarlabs.org>
Asunto: Re: Unbootable machine
Fecha: Mon, 01 Jun 2009 22:10:37 -0700

Bernie Innocenti wrote:
> On 06/02/09 03:43, H. Peter Anvin wrote:
>> Bernie Innocenti wrote:
>>> Disk /dev/sdb: 2055 MB, 2055208960 bytes
>>> 221 heads, 2 sectors/track, 9081 cylinders
>> I don't know where fdisk, the Linux kernel, or whatever come up with
>> these kinds of geometries.  They're almost universally non-bootable.
> 
> Ok, I wiped mbr and made fdisk create a new one:
> 
> Disk /dev/sdb: 2055 MB, 2055208960 bytes
> 64 heads, 62 sectors/track, 1011 cylinders
  ^^^^^^^^^^^^^^^^^^^^^^^^^^

Equally weird.  The only "standard" ones are 64 heads, 32 sectors and
255 heads, 63 sectors.

	-hpa


-- 
   // Bernie Innocenti - http://codewiz.org/
 \X/  Sugar Labs       - http://sugarlabs.org/