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Date: Mon, 11 Jul 2005 18:44:50 +0100
From: Richard Tector <richardtector@thekeelecentre.com>
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To: Martin Cracauer <cracauer@cons.org>
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Cc: freebsd-current@freebsd.org
Subject: Re: gvinum.  A little worse than I thought :-)
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Martin Cracauer wrote:

>What is a recommended ATA or SATA controller with hardware RAID5 and
>the capability to run different RAID levels on different parts of the
>disk these days?
>
>Martin
>  
>
I've had good results with both Areca 8 and 16 port cards (arcmsr 
driver) on -CURRENT and a couple of Adaptec 2410s on 5.x (aac driver). 
All SATA, though the Areca did seem to perform quite a bit better 
(+15-20MB/s on writes) during a bunch of quick dd tests I did using a 
month old -CURRENT. I haven't used any 3ware cards myself but I've heard 
good things.

With the Adaptec's it's fairly trivial to run say 2 seperate Raid5 sets 
across the disks or mirror 4 the first 5GB of each of 4 disks and use 
the rest of the space in RAID5, etc. I haven't tried this with the 
Areca's but brielfy looking at the documentation it seems possible.

I hope that's of some help.

Regards,

Richard Tector