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Date: Tue, 6 Oct 2015 22:41:58 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: "William A. Mahaffey III" <wam@hiwaay.net>
cc: FreeBSD Questions !!!! <freebsd-questions@freebsd.org>
Subject: Re: The saga continues
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On Tue, 6 Oct 2015, William A. Mahaffey III wrote:

> On 10/06/15 14:33, Polytropon wrote:
>> On Tue, 6 Oct 2015 08:25:06 -0453.75, William A. Mahaffey III wrote:
>>> >When I went to reboot, the UEFI 'BIOS' reported
>>> >'missing MBR record' & hung there.
>> Do you have "MBR legacy boot" enabled or forced? When using GPT
>> volumes, one of them has to be a "boot partition". Here you can
>> find a good illustration of the steps involved:
>> 
>> http://www.wonkity.com/~wblock/docs/html/disksetup.html#_the_new_standard_gpt
>> 
>> By the way, it's more like either "BIOS"_or_  "UEFI".;-)
>
>
> I have seen that page, & its sibling showing how to setup a RAID1 on 2 disks, 
> *very* helpful, & I think updated recently, they used to have the MBR stuff 
> at the top of the page & GPT farther down. I am following 
> http://www.wonkity.com/~wblock/docs/html/gmirror.html pretty closely in my 
> setup,

Please read the warning at the top of that page.  The Handbook shows the 
right way of using gmirror(8).  My page on it mirrors GPT partitions, 
which is likely to be a problem if one of the drives ever fails.  If you 
absolutely have to use gmirror(8) with GPT, use only one partition per 
drive.