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Date: Tue, 7 Feb 2012 13:28:49 -0700 (MST)
From: Warren Block <wblock@wonkity.com>
To: Jim Pazarena <fquest@paz.bz>
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	(wonkity.com [127.0.0.1]); Tue, 07 Feb 2012 13:28:49 -0700 (MST)
Cc: freebsd-questions@freebsd.org
Subject: Re: software raid
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On Tue, 7 Feb 2012, Jim Pazarena wrote:

> Does FreeBSD support any type of software raid?
> I have an old rack mount server which has 8 bays, but all SATA,
> and NO raid. Sure would be nice to have a software raid
> to create a NAS device.

Sure, multiple ways, in fact:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/geom-striping.html
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/geom-mirror.html
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/geom-raid3.html
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/filesystems-zfs.html
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/vinum-vinum.html
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/disks-hast.html

That's a start.  gmirror and ZFS are probably the most common.