[dba-Tech] Performance in disc partitions

One MB is the A8N-SLI. On this I used the PATA drives with RAID 1. the 
manual sais
NVIDIA nForce 4 SLI chipset supports 2xUltraDMA, 4xSATA (I used the 
UltraDMA, now I use the SATA drives)
I have not tried the SATA RAID which is Silicon Image 311 4R RAID 
controller.

the other MB is P4C800 deLuxe
Promise PDC20378,which supports:
- 1xUltraDMA 100 (I used this with RAID1 and it worked about 4 or 5 years. 
when it failed I replaced both disks and then every other day the array 
failed and had to be rebuildt, so I gave up and use the other connector 
which is SouthBridge ICH5

Also, IIRC, the onboard Raids are much slower.

Lembit

----- Original Message ----- 
From: "DJK(John) Robinson" <djkr at msn.com>
To: "'Discussion of Hardware and Software issues'" 
<dba-tech at databaseadvisors.com>
Sent: Monday, January 28, 2008 5:29 PM
Subject: Re: [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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