From mboxrd@z Thu Jan  1 00:00:00 1970
From: adfas asd <chimera_god@yahoo.com>
Subject: Re: Disappointing RAID10 Performance
Date: Sun, 18 Oct 2009 05:14:16 -0700 (PDT)
Message-ID: <615135.7191.qm@web38807.mail.mud.yahoo.com>
References: <7bc80d500910161433l49cbf599m80310082b6fdaa97@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Return-path: <linux-raid-owner@vger.kernel.org>
In-Reply-To: <7bc80d500910161433l49cbf599m80310082b6fdaa97@mail.gmail.com>
Sender: linux-raid-owner@vger.kernel.org
To: linux-raid@vger.kernel.org
List-Id: linux-raid.ids

> > Yeah two drives.  I didn't know I could have a RAID10
> > with 3 drives?  I thought I always had to add 2?  I'm
> > afraid to ask how it would set up an offset2 layout with
> > 3...
> Well you have to put it up on a
> whiteboard. It means that every data
> block exists as a "mirror" on any two drives. Hrm. It's
> fun. Draw it
> out :)

But to add a drive I have to tear down the array and rebuild it, right?  This gets impossible with the amount of data in larger arrays.

And I guess this isn't really relevant with my system, where one side of the mirror is in the HTPC, and the other is in the garage.  A fire in either place would destroy all data in an odd number drive system.