From owner-freebsd-questions@freebsd.org  Wed Aug 31 12:19:10 2016
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Date: Wed, 31 Aug 2016 06:19:05 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: Bertram Scharpf <lists@bertram-scharpf.de>
cc: freebsd-questions@freebsd.org
Subject: Re: Is it necessary to reinstall OS upon motherboard change?
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On Wed, 31 Aug 2016, Bertram Scharpf wrote:

> On Tuesday, 30. Aug 2016, 21:17:57 +0200, Polytropon wrote:
>> On Tue, 30 Aug 2016 19:10:55 +0000, Manish Jain wrote:
>>> (My hard disk and graphics card will remain unaltered).
>>
>> [...] In fact, I have a special FreeBSD HDD which I have
>> already booted on more than 10 totally different systems. :-)
>
> Isn't this exactly what live CDs and USBs do?

Yes.  In fact, setting up labels for the partitions and using

   ifconfig_DEFAULT="SYNCDHCP"

can make a system pretty portable.