[dba-Tech] Performance in disc partitions

That's a bit worrying, Lembit, since I'm getting close to building a new
system with onboard RAID!  Just waiting for Intel and Supermicro to release
the bits I'm after.

Do you know which RAID chip Asus were using?  And which RAID had you set up
(0/1/5/10, etc)?  I'm heading for RAID 1 with Intel's ICH9R.

John


-----Original Message-----
From: dba-tech-bounces at databaseadvisors.com
[mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Lembit Soobik
Sent: 28 January 2008 15:58
To: Discussion of Hardware and Software issues
Subject: Re: [dba-Tech] Performance in disc partitions


With RAID (OnBoard RAID, ASUS) I did have some pretty bad experience with 
some MBs.
After some time operating ok the RAID went bad again and again and required 
rebuild, until I decided to no longer use the RAID.

Lembit

----- Original Message ----- 
From: "jwcolby" <jwcolby at colbyconsulting.com>
To: "'Discussion of Hardware and Software issues'" 
<dba-tech at databaseadvisors.com>
Sent: Monday, January 28, 2008 4:15 PM
Subject: Re: [dba-Tech] Performance in disc partitions


> Since you mentioned the RAID thing I might as well add that as soon as 
> you put stuff on RAID that advantage may go away.  Raid takes over and 
> puts stuff where it will on the disks under its care.  It might very 
> well create the first volume on the edge, who knows.  OTOH it might 
> not.
>
>
> John W. Colby
> Colby Consulting
> www.ColbyConsulting.com
> -----Original Message-----
> From: dba-tech-bounces at databaseadvisors.com
> [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of DJK(John) 
> Robinson
> Sent: Monday, January 28, 2008 9:24 AM
> To: 'Discussion of Hardware and Software issues'
> Subject: Re: [dba-Tech] Performance in disc partitions
>
> Well, I've trawled the web, and come up with the usual bunch of
> conflicting,
> unsubstantiated tosh.  My favorite was along the lines of "running RAID 1
> completely eliminates the need for backup".  Yeah, right.  Step away from 
> my
> system, sir.
>
> The consensus, though, is that the first partition goes next to the 
> edge, with the last one by the spindle.  People differ in saying what 
> difference this makes - a lot or hardly any: 
> http://partition.radified.com/partitioning_2.htm
> http://www.xsibase.com/forum/index.php?board=15;action=display;threadi
> d=3452
> 8
>
> I found PassMark Performance Test (30-day free trial) at 
> http://www.passmark.com/products/pt.htm;  I've no idea how good it is 
> generally
>
> I tried this on first and last partitions on a 500GB disc and got 
> results suggesting 25%-45% better performance on the *first* 
> partition, which supports the 'edge is first is better' theory.  I'm 
> not publishing the results, because they weren't on a scientific 
> basis, but I *am* going to put my active stuff first, near the edge, 
> and my dormant stuff last!
>
> John
>
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