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From: Josh Paetzel <josh@tcbug.org>
To: freebsd-questions@freebsd.org
Date: Sat, 19 Feb 2005 00:56:22 -0600
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cc: "Chad Leigh -- Shire.Net LLC" <chad@shire.net>
cc: Spades <spades@galaxynet.org>
Subject: Re: raid1
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On Saturday 19 February 2005 00:51, Chad Leigh -- Shire.Net LLC wrote:
> On Feb 18, 2005, at 11:39 PM, Spades wrote:
> > hi, my server hardware supports hardware raid, i installed it
> > as per normal freebsd 5.3, however i see no difference
> > in df. its using 2 x 160GB, what do i do during the installation
> > to enable the raid?
> >
> > mobo:
> > http://www.supermicro.com/products/motherboard/Xeon800/E7320/X6DV
> >L- EG.cfm
> >
> > -bash-2.05b$ df
> > Filesystem  1K-blocks   Used    Avail Capacity  Mounted on
> > /dev/ad4s1a  66008394  35424 60692300     0%    /
> > devfs               1      1        0   100%    /dev
> > /dev/ad4s1d  66008394     24 60727700     0%    /home
> > /dev/ad4s1e  10154158 683442  8658384     7%    /usr
> > /dev/ad4s1f   8172302    982  7517536     0%    /var
> > -bash-2.05b$
>
> What do you expect to see?
>
> A raid1 is a mirror set and to the OS would probably look like a
> single drive if it truly is a HW raid
>
> Chad

The RAID will ususally show up as something other than ad(x).  
Generally you create the RAID array in the controller's BIOS and 
FreeBSD detects it as a single disk (in my case ar0).  You may want 
to google around to see if your controller is supported.

-- 
Thanks,

Josh Paetzel