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Date: Wed, 19 Jul 2006 16:41:41 -0400
From: Bill Moran <wmoran@collaborativefusion.com>
To: "Jim Freeze" <jim@freeze.org>
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Cc: questions@freebsd.org
Subject: Re: Need advice on Raid and FreeNas
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In response to "Jim Freeze" <jim@freeze.org>:

> On 7/19/06, pete wright <nomadlogic@gmail.com> wrote:
> > On 7/19/06, Jim Freeze <jim@freeze.org> wrote:
> > > Hi
> > >
> > > I am setting up a file server for a small office (10 computers).
> > > My first attempt at this I used FreeNas. It was easy to setup
> > > and I like that the system is dedicated.
> > >
> > > One downside of this method is that the write times are slower
> > > than I expected. I am using SATA2 drives w/ 8MB buffer on a
> > > 100MB network, but the write times I was getting was about
> > > 2.5GB per hour. I expected 5 GB in ten minutes.
> > >
> > a better metric for us would be network throughput and disk I/O over a
> > shorter period, like kilobit's per sec.
> 
> Well, if I do the math, 5GB/3600 =  1356 KB/sec.
> A 100MB/s network has a maximum thruput of 12800KB/sec.
> 
> So, I am getting 10% of the available BW.

Have you checked to make sure the NIC is negotiating at the right speed?
Sounds suspiciously like it's running at 10MB/sec.

[snip]

-- 
Bill Moran
Collaborative Fusion Inc.