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Date: Wed, 1 Nov 2017 09:27:12 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: Elxa Kiltse <whereisalext@gmail.com>
cc: FreeBSD Questions <freebsd-questions@freebsd.org>
Subject: Re: new GPT/UFS ssd drive not booting
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On Wed, 11 Oct 2017, Elxa Kiltse wrote:

> Hello,
>
>    I installed a new ssd, following the instructions at:
>
> http://www.wonkity.com/~wblock/docs/html/ssd.html
>
> It all went fine, but when I try to boot the system it says:
>
>
> Trying to mount root from ufs:/dev/ufs/gptroot
> ROOT MOUNT ERROR:
> If you have invalid mount options, reboot, and first try the following from
> the loader prompt:
>  set vfs.root.mountfrom.options=rw

Edit /etc/fstab in ssdrootfs on the SSD, which probably still has a copy 
of the hard drive version.  The loader reads that to get the root 
device.  Don't set those values in /boot/loader.conf.