Received: from localhost (maia-3.hub.org [200.46.204.184]) by postgresql.org (Postfix) with ESMTP id 58BD99FBDA4 for ; Wed, 30 May 2007 00:31:56 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.184]) (amavisd-maia, port 10024) with ESMTP id 62471-04 for ; Wed, 30 May 2007 00:31:52 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.5 Received: from tamriel.snowman.net (tamriel.snowman.net [72.66.115.51]) by postgresql.org (Postfix) with ESMTP id E6C2F9FBCFD for ; Wed, 30 May 2007 00:31:52 -0300 (ADT) Received: by tamriel.snowman.net (Postfix, from userid 1000) id 3730684194; Tue, 29 May 2007 23:31:52 -0400 (EDT) Date: Tue, 29 May 2007 23:31:52 -0400 From: Stephen Frost To: Luke Lonergan Cc: Rajesh Kumar Mallah , pgsql-performance@postgresql.org Subject: Re: setting up raid10 with more than 4 drives Message-ID: <20070530033152.GV7531@tamriel.snowman.net> Mail-Followup-To: Luke Lonergan , Rajesh Kumar Mallah , pgsql-performance@postgresql.org References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="3jK+0sHr6j/jwA0V" Content-Disposition: inline In-Reply-To: X-Editor: Vim http://www.vim.org/ X-Info: http://www.snowman.net X-Operating-System: Linux/2.6.18-4-vserver-amd64 (x86_64) X-Uptime: 23:30:58 up 22 days, 23:44, 24 users, load average: 0.02, 0.06, 0.07 User-Agent: Mutt/1.5.13 (2006-08-11) X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200705/599 X-Sequence-Number: 24989 --3jK+0sHr6j/jwA0V Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable * Luke Lonergan (llonergan@greenplum.com) wrote: > Hi Rajesh, >=20 > On 5/29/07 7:18 PM, "Rajesh Kumar Mallah" wrote: >=20 > > D1 raid1 D2 raid1 D5 --> MD0 > > D3 raid1 D4 raid1 D6 --> MD1 > > MD0 raid0 MD1 --> MDF (final) >=20 > AFAIK you can't RAID1 more than two drives, so the above doesn't make sen= se > 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 --3jK+0sHr6j/jwA0V Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFGXPAorzgMPqB3kigRAhthAJ9eqVAMFf9FB3HwfVrMdNsxqSe3NQCeOL7u STRTW52DKJOZrkjv/kSHeA8= =1dWf -----END PGP SIGNATURE----- --3jK+0sHr6j/jwA0V--