From owner-freebsd-stable@FreeBSD.ORG  Wed May  2 09:03:48 2012
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Date: Wed, 02 May 2012 16:03:46 +0700
From: Adam Strohl <adams-freebsd@ateamsystems.com>
Organization: A-Team Systems
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To: "Andrey V. Elsukov" <ae@FreeBSD.org>
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Cc: FreeBSD-Stable ML <freebsd-stable@freebsd.org>
Subject: Re: FreeBSD 9 "gptboot: invalid backup GPT header" error (boots fine
 though)
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Thanks Andrey,

I've just recompiled /boot/gptboot after updating gpt.c and installed it 
via:

gpart bootcode -p /boot/gptboot -i 1 da0

I still see "gptboot: invalid backup GPT header" on boot (but it does 
still boot).

On 5/2/2012 12:58, Andrey V. Elsukov wrote:
> On 30.04.2012 23:14, Adam Strohl wrote:
>> da0 at tws0 bus 0 scbus0 target 0 lun 0
>> da0:<LSI 9750-8i    DISK 5.12>  Fixed Direct Access SCSI-5 device
>> da0: 6000.000MB/s transfers
>> da0: 2860992MB (5859311616 512 byte sectors: 255H 63S/T 364725C)
>>
>>
>> Let me know anyone wants to see anything else/has seen this/has any theories!
>
> Can you try patch from the r234693, update and reinstall gptboot, does it help?
> 	http://svnweb.freebsd.org/base?view=revision&revision=234693
>