Re: bin/46228: bootloader can't load kernel on Dell 2850

[Piotr Meyer <aniou%smutek.pl@localhost>]

The following reply was made to PR bin/46228; it has been noted by GNATS.

From: Piotr Meyer <aniou%smutek.pl@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: bin/46228: bootloader can't load kernel on Dell 2850
Date: Tue, 27 Mar 2012 10:32:41 +0200

 On Mon, Mar 26, 2012 at 08:10:05PM +0000, Manuel Bouyer wrote:
 
 >  > I found that /usr/mdec/boot built without GPT support boots fine.
 >  > 
 >  > After enabling CPPFLAGS+= -DNO_GPT in sys/arch/i386/stand/lib/Makefile
 >  > re-compiled /usr/mdec/boot works - compiled again, but with above 
 >  > definition commented out - fails exactly as in my first mail. 
 >  > 
 >  > Maybe something left on disk? I had FreeBSD 9.x previously installed 
 >  > on this host.
 >  
 >  yes, that could be the problem.
 >  Maybe try gpt destroy -r ?
 
 Still no luck - gpt refuse any form of cooperation, all operations
 (remove, migrate, show) gave me simply:
 
  'gpt: error: bogus map'
 
 Finally I found some suggestions: http://markmail.org/message/efyk7bbzvssidvl5
 - looks like I got mix of GPT and MBR partitions:
 
 # gpt -vvv show ld0
 gpt: rld0d: mediasize=145458462720; sectorsize=512; blocks=284098560
 gpt: rld0d: MBR at sector 0
 gpt: rld0d: MBR part: type=169, start=63, size=284098497
 gpt: rld0d: Pri GPT at sector 1
 gpt: rld0d: GPT partition: type=83bd6b9d-7f41-11dc-be0b-001560b84f0f, 
start=34, size=128
 gpt: error: bogus map
 gpt: unable to open device 'rld0d': Undefined error: 0
 
 
 The quickest solution for me is simply clearing disk and re-installing system,
 (it isn't a problem for me) but - IMVHO - this case should be covered in 
install 
 notes (or, better, at installer level - at least as BIG warning in 
partitioning 
 menu "Warning: GPT partition is already present..." etc).
 
 -- 
 Piotr 'aniou' Meyer