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Date:      Wed, 02 May 2012 20:08:45 +0400
From:      "Andrey V. Elsukov" <bu7cher@yandex.ru>
To:        Adam Strohl <adams-freebsd@ateamsystems.com>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: FreeBSD 9 "gptboot: invalid backup GPT header" error (boots fine though)
Message-ID:  <4FA15C0D.2050107@yandex.ru>
In-Reply-To: <4FA13C48.8010700@ateamsystems.com>
References:  <4F9EE487.6020609@ateamsystems.com> <4FA0CCF0.5000607@FreeBSD.org> <4FA0F872.4040008@ateamsystems.com> <CAMXt9NbdnmsJH33iCFW91ycTO2wM1dqstFcEL1f=-krqk1Graw@mail.gmail.com> <4FA13C48.8010700@ateamsystems.com>

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On 02.05.2012 17:53, Adam Strohl wrote:
>> % gpart recover da0 
> 
> Good thought, but no dice:
> 
> $ gpart recover da0
> da0 recovering is not needed

I already saw several reports about gptboot's complains on 3ware
controllers, but don't know what is the problem.
The only guess is that a controller incorrectly handles BIOS requests,
when gptboot tries to read GPT header from the end of a large virtual disk.

-- 
WBR, Andrey V. Elsukov



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