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From: Marcel Moolenaar <xcllnt@mac.com>
To: "James R. Van Artsdalen" <james-freebsd-current@jrv.org>
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Date: Sat, 13 Jun 2009 17:59:25 -0700
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Cc: Alexander Best <alexbestms@math.uni-muenster.de>,
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Subject: Re: `gpart show` and secondary GPT header
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On Jun 13, 2009, at 5:55 PM, James R. Van Artsdalen wrote:

> Marcel Moolenaar wrote:
>> In any case: the primary and secondary GPT headers
>> and tables are in fact on the disk. They're there,
>> trust me :-)
>
> Unless you're using a Silicon Image 3124 controller :-(
>
> FYI - the option ROM on this card appears to clobber the secondary GPT
> table.  Moving disks to a 3124 results in this:

> Jun 13 06:31:42 bigback kernel: GEOM: ad4: the secondary GPT table is
> corrupt or invalid.
> Jun 13 06:31:42 bigback kernel: GEOM: ad4: using the primary only --
> recovery suggested.
> Jun 13 06:31:42 bigback kernel: GEOM: ad12: the secondary GPT table is
> corrupt or invalid.
> Jun 13 06:31:42 bigback kernel: GEOM: ad12: using the primary only --
> recovery suggested.

Are you using gmirror by any chance?

-- 
Marcel Moolenaar
xcllnt@mac.com