Date:  Fri, 12 Oct 2007 16:21:37 +0100
From:  Dogsbody <dan (at mark) dogsbody.org>
Subject:  [coba-e:10876] Re: nuonce 4.7 BQ on Asus RS100-E4/P12 server
To:  coba-e (at mark) bluequartz.org
Message-Id:  <470F9101.9070109 (at mark) dogsbody.org>
In-Reply-To:  <aaf301c80cdb$77ea8b10$0601a8c0@systemax>
References:  <aaf301c80cdb$77ea8b10$0601a8c0@systemax>
X-Mail-Count: 10876



On 12/10/2007 15:23, Gerald Waugh was seen to type:
>>> Best to disable hardware raid, the system will use software raid
>>> This should work...
>>> Which in many cases is preferable.
>>
>> I beg to differ there through.  Software RAID uses the system 
>> CPU while 
>> (good) Hardware RAID has a dedicated chip to do the processing.
> 
> It depends on the hardware, many servers use FRAID (fake raid) hardware.
> Which, also uses CPU...
> 
> I believe if you are going to use hardware RAID, then you need to do a
> single drive install. The hardware will then handle the mirroring. But
> swatch will not monitor raid status. So you need to have the BIOS notify
> of raid failures, not sure how that works...

Absolutely, beware of FRAID (usually just the dirty cheap cards) and 
yes, just do a single drive install.

For monitoring most good manufacturers provide a client (usually a 
simple RPM to install) that monitors the controller and will notify in 
the same way.

Dan