From: Stephen Frost <sfrost@snowman.net>
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: Tue, 29 May 2007 23:31:52 -0400
Message-ID: <20070530033152.GV7531@tamriel.snowman.net> (raw)
In-Reply-To: <C2823CFD.31AEB%llonergan@greenplum.com>
References: <a97c77030705291918j54b88259ia2f725e8b9e39dd6@mail.gmail.com>
<C2823CFD.31AEB%llonergan@greenplum.com>
* Luke Lonergan (llonergan@greenplum.com) wrote:
> Hi Rajesh,
>
> On 5/29/07 7:18 PM, "Rajesh Kumar Mallah" <mallah.rajesh@gmail.com> wrote:
>
> > D1 raid1 D2 raid1 D5 --> MD0
> > D3 raid1 D4 raid1 D6 --> MD1
> > MD0 raid0 MD1 --> MDF (final)
>
> AFAIK you can't RAID1 more than two drives, so the above doesn't make sense
> to me.
It's just more copies of the same data if it's really a RAID1, for the
extra, extra paranoid. Basically, in the example above, I'd read it as
"D1, D2, D5 have identical data on them".
Thanks,
Stephen
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To: pgsql-performance@postgresql.org
Cc: sfrost@snowman.net, llonergan@greenplum.com, mallah.rajesh@gmail.com
Subject: Re: setting up raid10 with more than 4 drives
In-Reply-To: <20070530033152.GV7531@tamriel.snowman.net>
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