From owner-freebsd-isp  Tue Mar  7 14:39:16 2000
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From: Kevin Day <toasty@dragondata.com>
Message-Id: <200003072239.QAA93953@celery.dragondata.com>
Subject: Re: Vinum Stripe Size
To: webweaver@rmci.net (Ken)
Date: Tue, 7 Mar 2000 16:39:07 -0600 (CST)
Cc: freebsd-isp@FreeBSD.ORG
In-Reply-To: <4.2.0.58.20000307152825.00956e20@mail.rmci.net> from "Ken" at Mar 07, 2000 03:32:56 PM
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> 
> Greets:
> 
> Vinum simple config uses 256k stripe sizes.  However, the examples in _The 
> Complete FBSD_ and Greg's web pages use 512k stripe size.  It doesn't 
> appear that this will make a whole lot of difference one way or the other, 
> but I am curious about what others are using.  This application is for 
> stripped mirror on four 9GB drives.
> 
> Thanks for your output-- Ken
> 

Actually, I discovered that with 4 drives, you're much better off using an
odd stripe size. (not a power of two) This is because of how the cylinder
groups are laid out, they'll all end up on one drive.

You may want to ask Greg Lehey (grog@lemis.com) for more info about this, as
I can't remember exactly what he came up with for an optimum stripe size.


Kevin


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