From: Jonah H. Harris <jonah.harris@gmail.com>
To: Luke Lonergan <llonergan@greenplum.com>
Cc: Rajesh Kumar Mallah <mallah.rajesh@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: setting up raid10 with more than 4 drives
Date: Wed, 30 May 2007 00:41:46 -0400
Message-ID: <36e682920705292141k9aa038btb543d97cee0fa4a1@mail.gmail.com> (raw)
In-Reply-To: <C2823CFD.31AEB%llonergan@greenplum.com>
References: <a97c77030705291918j54b88259ia2f725e8b9e39dd6@mail.gmail.com>
<C2823CFD.31AEB%llonergan@greenplum.com>
On 5/29/07, Luke Lonergan <llonergan@greenplum.com> wrote:
> AFAIK you can't RAID1 more than two drives, so the above doesn't make sense
> to me.
Yeah, I've never seen a way to RAID-1 more than 2 drives either. It
would have to be his first one:
D1 + D2 = MD0 (RAID 1)
D3 + D4 = MD1 ...
D5 + D6 = MD2 ...
MD0 + MD1 + MD2 = MDF (RAID 0)
--
Jonah H. Harris, Software Architect | phone: 732.331.1324
EnterpriseDB Corporation | fax: 732.331.1301
33 Wood Ave S, 3rd Floor | jharris@enterprisedb.com
Iselin, New Jersey 08830 | http://www.enterprisedb.com/
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To: pgsql-performance@postgresql.org
Cc: jonah.harris@gmail.com, llonergan@greenplum.com, mallah.rajesh@gmail.com
Subject: Re: setting up raid10 with more than 4 drives
In-Reply-To: <36e682920705292141k9aa038btb543d97cee0fa4a1@mail.gmail.com>
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