Message-ID: <4DDEDFFF.1060304@2ndquadrant.com>
Date: Thu, 26 May 2011 19:19:27 -0400
From: Greg Smith <greg@2ndquadrant.com>
User-Agent: Thunderbird 2.0.0.24 (X11/20100317)
MIME-Version: 1.0
To: Mark Kirkwood <mark.kirkwood@catalyst.net.nz>
CC: =?UTF-8?B?R3J6ZWdvcnogSmHFm2tpZXdpY3o=?= <gryzman@gmail.com>,
	postgres performance list <pgsql-performance@postgresql.org>
Subject: Re: serveRAID M5014 SAS
References: <BANLkTi=fE2YCS0Lra42ei1hFrKqXdVk2jA@mail.gmail.com>
	<4DDD81BB.4080801@catalyst.net.nz>	<4DDD85C7.6030109@catalyst.net.nz>
	<BANLkTi=PAymQvudx1eyuuOV9vAAoydan9g@mail.gmail.com>
	<4DDE0E77.6070804@catalyst.net.nz>
In-Reply-To: <4DDE0E77.6070804@catalyst.net.nz>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit

Mark Kirkwood wrote:
> You can interrogate the config of the card and the raid 10 array using 
> the megaraid cli package - you need to read the (frankly terrible) 
> manual to discover which switches to use to determine battery and 
> cache status etc. If you email me privately I'll get you a link to the 
> relevant docs!

That's assuming the MegaCli utility will work against IBM's version of 
the card.  They use an LSI chipset for the RAID parts, but I don't know 
if the card is so similar that it will talk using that utility or not.

The main useful site here is 
http://tools.rapidsoft.de/perc/perc-cheat-sheet.html ; here's how to 
dump all the main config info from an LSI card:

MegaCli64 -LDInfo -Lall -aALL

You want to see a line like this:

  Current Cache Policy: WriteBack, ReadAheadNone, Direct, No Write Cache 
if Bad BBU

For the arrays.  And then check the battery like this:

MegaCli64 -AdpBbuCmd -aALL

-- 
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