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Re: H800 + md1200 Performance problem

From: Merlin Moncure <mmoncure(at)gmail(dot)com>
To: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
Cc: Cesar Martin <cmartinp(at)gmail(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: H800 + md1200 Performance problem
Date: 2012-04-04 18:58:58
Message-ID: CAHyXU0xXPHcBfSxg4_eHyBy9E3Jvf+h1gNgrfOKZ1P=-no7Ckw@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-performance
On Wed, Apr 4, 2012 at 1:55 PM, Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> wrote:
> On Wed, Apr 4, 2012 at 12:46 PM, Cesar Martin <cmartinp(at)gmail(dot)com> wrote:
>> Raid controller issue or driver problem was the first problem that I
>> studied.
>> I installed Centos 5.4 al the beginning, but I had performance problems, and
>> I contacted Dell support... but Centos is not support by Dell... Then I
>> installed Redhat 6 and we contact Dell with same problem.
>> Dell say that all is right and that this is a software problem.
>> I have installed Centos 5.4, 6.2 and Redhat 6 with similar result, I think
>> that not is driver problem (megasas-raid kernel module).
>> I will check kernel updates...
>> Thanks!
>
> Look for firmware updates to your RAID card.

allready checked that: look here:
http://www.dell.com/support/drivers/us/en/04/DriverDetails?DriverId=R269683&FileId=2731095787&DriverName=Dell%20PERC%20H800%20Adapter%2C%20v.12.3.0-0032%2C%20A02&urlProductCode=False

latest update is july 2010.  i've been down this road with dell many
times and I would advise RMAing the whole server -- that will at least
get their attention. dell performance/software support is worthless
and it's a crying shame blowing 10 grand on a server only to have it
underperform your 3 year old workhorse.

merlin

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