Received: from maia.hub.org (maia-5.hub.org [200.46.204.29])
	by mail.postgresql.org (Postfix) with ESMTP id 456411337BFB
	for <pgsql-performance-postgresql.org@mail.postgresql.org>;
	Thu,  3 Feb 2011 02:15:58 -0400 (AST)
Received: from mail.postgresql.org ([200.46.204.86])
	by maia.hub.org (mx1.hub.org [200.46.204.29]) (amavisd-maia, port 10024)
	with ESMTP id 15707-02-6
	for <pgsql-performance-postgresql.org@mail.postgresql.org>;
	Thu,  3 Feb 2011 06:15:51 +0000 (UTC)
X-Greylist: from auto-whitelisted by SQLgrey-1.7.6
Received: from moutng.kundenserver.de (moutng.kundenserver.de
	[212.227.126.171])
	by mail.postgresql.org (Postfix) with ESMTP id A32321337BD1
	for <pgsql-performance@postgresql.org>;
	Thu,  3 Feb 2011 02:15:36 -0400 (AST)
Received: from [192.168.1.6] (mail.highperformancepostgresql.com
	[71.179.240.8])
	by mrelayeu.kundenserver.de (node=mrbap1) with ESMTP (Nemesis)
	id 0MQu7S-1PaONc1sZa-00Uc8D; Thu, 03 Feb 2011 07:15:35 +0100
Message-ID: <4D4A4804.3040307@2ndquadrant.com>
Date: Thu, 03 Feb 2011 01:15:32 -0500
From: Greg Smith <greg@2ndquadrant.com>
User-Agent: Thunderbird 2.0.0.24 (X11/20100317)
MIME-Version: 1.0
To: Scott Marlowe <scott.marlowe@gmail.com>
CC: Dan Birken <birken@gmail.com>,
	pgsql-performance <pgsql-performance@postgresql.org>
Subject: Re: Which RAID Controllers to pick/avoid?
References: <AANLkTimyRh1ieWxpCo1ht2D1fkmL+Ca_8ABBEw6yN2WR@mail.gmail.com>
	<4D4A411A.3040102@2ndquadrant.com>
	<AANLkTinB98Wgk+pzA_A9Ro=LTtmJJXFrkLVVM6h_d+AP@mail.gmail.com>
In-Reply-To: <AANLkTinB98Wgk+pzA_A9Ro=LTtmJJXFrkLVVM6h_d+AP@mail.gmail.com>
Content-Type: multipart/alternative;
	boundary="------------080804020401020004010205"
X-Provags-ID: V02:K0:Ru7Ffr7yF8APD9hS12KXFOVxE+07+ih2Y4xifU28zmB
	jGdbSxEz36UAmfZG0ohpgfepueun3lGhiHSL4TFYRQTlqWl9Ty
	AhVtzayPzFo7LE1VqT27XZzam4BqqVWrvMxscp/NtPaUn+Atq6
	/8EKwiq1CJzMWTAyaMwt7rexrl9xOHvT7Stsy5adVOeC0LAO3+
	XEvVoGUeXTzbxcMslShp1zQnIDczkCPjQwS58LDMOo=
X-Virus-Scanned: Maia Mailguard 1.0.1
X-Spam-Status: No, hits=-1.899 tagged_above=-10 required=5
	tests=BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001
X-Spam-Level: 
X-Archive-Number: 201102/62
X-Sequence-Number: 42200

This is a multi-part message in MIME format.
--------------080804020401020004010205
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Scott Marlowe wrote:
> On Wed, Feb 2, 2011 at 10:46 PM, Greg Smith <greg@2ndquadrant.com> wrote:
>   
>> example.  Scott Marlowe was griping recently about a similar issue in some
>> of the LSI models, too.  I suspect it's a problem impacting several of the
>> larger RAID cards that use the big Intel IOP processors for their RAID
>> computations, given that's the part with the heatsink on it.
>>     
>
> Specifically the LSI 8888 in a case that gave very low amounts of air
> flow over the RAID card.  The case right above the card was quite hot,
> and the multilane cable was warm enough to almost burn my fingers whe

Interesting...that shoots down my theory.  Now that I check, the LSI 
8888 uses their SAS1078 controller, which is based on a PowerPC 440 
processor--it's not one of the Intel IOP processors at all.  The 8308 
Dan has as an option is using the very popular Intel IOP333 instead, 
which is also used in some Areca 1200 series cards (1220/1230/1260).

The Adaptec 5405 and 5805 cards both use the Intel IOP348, as does the 
Areca 1680.  Areca puts a fan right on it; Adaptec does not.    I 
suspect the only reason the 5805 cards have gotten more reports of 
overheating than the 5405 ones is just because having more drives 
typically connected increases their actual workload.  I don't think 
there's actually any difference between the cooling situation between 
the two otherwise.

-- 
Greg Smith   2ndQuadrant US    greg@2ndQuadrant.com   Baltimore, MD
PostgreSQL Training, Services, and 24x7 Support  www.2ndQuadrant.us
"PostgreSQL 9.0 High Performance": http://www.2ndQuadrant.com/books


--------------080804020401020004010205
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
  <title></title>
</head>
<body bgcolor="#ffffff" text="#000000">
Scott Marlowe wrote:
<blockquote
 cite="mid:AANLkTinB98Wgk+pzA_A9Ro=LTtmJJXFrkLVVM6h_d+AP@mail.gmail.com"
 type="cite">
  <pre wrap="">On Wed, Feb 2, 2011 at 10:46 PM, Greg Smith <a class="moz-txt-link-rfc2396E" href="mailto:greg@2ndquadrant.com">&lt;greg@2ndquadrant.com&gt;</a> wrote:
  </pre>
  <blockquote type="cite">
    <pre wrap="">example.&nbsp; Scott Marlowe was griping recently about a similar issue in some
of the LSI models, too.&nbsp; I suspect it's a problem impacting several of the
larger RAID cards that use the big Intel IOP processors for their RAID
computations, given that's the part with the heatsink on it.
    </pre>
  </blockquote>
  <pre wrap=""><!---->
Specifically the LSI 8888 in a case that gave very low amounts of air
flow over the RAID card.  The case right above the card was quite hot,
and the multilane cable was warm enough to almost burn my fingers whe</pre>
</blockquote>
<br>
Interesting...that shoots down my theory.&nbsp; Now that I check, the LSI
8888 uses their SAS1078 controller, which is based on a PowerPC 440
processor--it's not one of the Intel IOP processors at all.&nbsp; The 8308
Dan has as an option is using the very popular Intel IOP333 instead,
which is also used in some Areca 1200 series cards (1220/1230/1260).<br>
<br>
The Adaptec 5405 and 5805 cards both use the Intel IOP348, as does the
Areca 1680.&nbsp; Areca puts a fan right on it; Adaptec does not.&nbsp;&nbsp;&nbsp; I
suspect the only reason the 5805 cards have gotten more reports of
overheating than the 5405 ones is just because having more drives
typically connected increases their actual workload.&nbsp; I don't think
there's actually any difference between the cooling situation between
the two otherwise.<br>
<br>
<pre class="moz-signature" cols="72">-- 
Greg Smith   2ndQuadrant US    <a class="moz-txt-link-abbreviated" href="mailto:greg@2ndQuadrant.com">greg@2ndQuadrant.com</a>   Baltimore, MD
PostgreSQL Training, Services, and 24x7 Support  <a class="moz-txt-link-abbreviated" href="http://www.2ndQuadrant.us">www.2ndQuadrant.us</a>
"PostgreSQL 9.0 High Performance": <a class="moz-txt-link-freetext" href="http://www.2ndQuadrant.com/books">http://www.2ndQuadrant.com/books</a>
</pre>
</body>
</html>

--------------080804020401020004010205--