Received: from localhost (maia-4.hub.org [200.46.204.183])
	by postgresql.org (Postfix) with ESMTP id 652689FBE5A
	for <pgsql-performance-postgresql.org@postgresql.org>;
	Wed, 30 May 2007 12:53:07 -0300 (ADT)
Received: from postgresql.org ([200.46.204.71])
	by localhost (mx1.hub.org [200.46.204.183]) (amavisd-maia, port 10024)
	with ESMTP id 92929-01 for
	<pgsql-performance-postgresql.org@postgresql.org>;
	Wed, 30 May 2007 12:53:06 -0300 (ADT)
X-Greylist: from auto-whitelisted by SQLgrey-1.7.5
Received: from chip2og53.obsmtp.com (chip2og53.obsmtp.com [64.18.13.43])
	by postgresql.org (Postfix) with SMTP id 7D9F99FB69A
	for <pgsql-performance@postgresql.org>;
	Wed, 30 May 2007 12:53:05 -0300 (ADT)
Received: from source ([63.240.6.44]) (using TLSv1) by chip2ob53.postini.com
	([64.18.5.12]) with SMTP; Wed, 30 May 2007 08:52:55 PDT
Received: from 172.16.1.92 by mail.mi8.com with ESMTP (- Welcome to Mi8
	Corporation www.Mi8.com (D4)); Wed, 30 May 2007 11:52:41 -0400
X-Server-Uuid: C8FB4D43-1108-484A-A898-3CBCC7906230
Received: from MI8NYCMAIL08.Mi8.com ([172.16.1.165]) by
	d01smtp08.Mi8.com with Microsoft SMTPSVC(6.0.3790.1830); Wed, 30 May
	2007 11:52:41 -0400
Received: from 63.80.24.130 ([63.80.24.130]) by MI8NYCMAIL08.Mi8.com (
	[172.16.1.190]) via Exchange Front-End Server mi8owa.mi8.com (
	[172.16.1.134]) with Microsoft Exchange Server HTTP-DAV ; Wed, 30 May
	2007 15:51:46 +0000
User-Agent: Microsoft-Entourage/11.3.3.061214
Date: Wed, 30 May 2007 08:51:45 -0700
Subject: Re: setting up raid10 with more than 4 drives
From: "Luke Lonergan" <llonergan@greenplum.com>
To: "Michael Stone" <mstone+postgres@mathom.us>,
	pgsql-performance@postgresql.org
Message-ID: <C282EBA1.31B8C%llonergan@greenplum.com>
Thread-Topic: [PERFORM] setting up raid10 with more than 4 drives
Thread-Index: AceizNuWslUBsBxWQ0KOU34CxB/aBQAAVIRyAAEPtMU=
In-Reply-To: <C3E62232E3BCF24CBA20D72BFDCB6BF802AF2F1B@MI8NYCMAIL08.Mi8.com>
MIME-Version: 1.0
X-OriginalArrivalTime: 30 May 2007 15:52:41.0397 (UTC)
	FILETIME=[8E15BE50:01C7A2D2]
X-WSS-ID: 6A43424D1AG15525857-06-01
Content-Type: multipart/alternative;
 boundary=B_3263359906_157395
X-Virus-Scanned: Maia Mailguard 1.0.1
X-Archive-Number: 200705/620
X-Sequence-Number: 25010

> This message is in MIME format. Since your mail reader does not understand
this format, some or all of this message may not be legible.

--B_3263359906_157395
Content-Type: text/plain;
 charset=us-ascii
Content-Transfer-Encoding: 7bit


> This is standard stuff, very well proven: try googling 'self healing zfs'.

The first hit on this search is a demo of ZFS detecting corruption of one of
the mirror pair using checksums, very cool:
  
http://www.opensolaris.org/os/community/zfs/demos/selfheal/;jsessionid=52508
D464883F194061E341F58F4E7E1

The bad drive is pointed out directly using the checksum and the data
integrity is preserved.

- Luke


--B_3263359906_157395
Content-Type: text/html;
 charset=us-ascii
Content-Transfer-Encoding: quoted-printable

<HTML>
<HEAD>
<TITLE>Re: [PERFORM] setting up raid10 with more than 4 drives</TITLE>
</HEAD>
<BODY>
<FONT FACE=3D"Verdana, Helvetica, Arial"><SPAN STYLE=3D'font-size:14.0px'><BR>
<FONT COLOR=3D"#0000FF">&gt; This is standard stuff, very well proven: try go=
ogling 'self healing zfs'.<BR>
</FONT><BR>
The first hit on this search is a demo of ZFS detecting corruption of one o=
f the mirror pair using checksums, very cool:<BR>
&nbsp;&nbsp;<a href=3D"http://www.opensolaris.org/os/community/zfs/demos/self=
heal/;jsessionid=3D52508D464883F194061E341F58F4E7E1">http://www.opensolaris.or=
g/os/community/zfs/demos/selfheal/;jsessionid=3D52508D464883F194061E341F58F4E7=
E1</a><BR>
<BR>
The bad drive is pointed out directly using the checksum and the data integ=
rity is preserved.<BR>
<BR>
- Luke<BR>
</SPAN></FONT>
</BODY>
</HTML>


--B_3263359906_157395--