Date: Fri, 28 Apr 2000 07:56:07 -0400 From: Mike Tancsa <mike@sentex.net> To: Mark Powell <M.S.Powell@salford.ac.uk>, freebsd-stable@FreeBSD.ORG Subject: Re: How good is AMI MegaRAID support? Message-ID: <4.2.2.20000428074518.03404fa0@mail.sentex.net> In-Reply-To: <Pine.BSF.4.05.10004281216060.36055-100000@plato.salford.ac .uk>
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At 12:22 PM 4/28/2000 +0100, Mark Powell wrote:
>As the DPT SmartRAID IV controllers are now obsolete, what's the best bet
>for hardware RAID under FreeBSD? From a bit of reading the AMI
>controllers seem to be well featured and regarded. Just how good is the
>support for these controllers in 4.0R? I'm trying to hold off using 4.x on
>any servers until I've used 4.0R for a while to become familiar with it
>and more specifically until 4.1R is released.
If you are using 3.x you might as well start using 4.x in production, as it
is as stable if not more as the 3.x branch was/is. As for RAID support, I
would say take a look at the Mylex cards. In comparing two older models
(the AMI 428 vs the DAC960P/PD) the found the performance differences
minor, if not insignificant. Similarly, the feature set is not *that*
different and might be irrelevant for you-- Especially if all you want is
RAID 0,1,5 )
You might want to pick up a Mylex and a AMI off of E-Bay cheap and test
them out for your self. I have been using 4.x for our internal Squid proxy
with great results. I didnt have problems with the AMI card, except that I
could artificially wedge it under high load. There have been new patches
to the driver, so its possible the problem has been fixed, but I havent had
time to test that. For us the plan is to replace our main production
servers with 4.x as soon as we have the time to do it with Mylex cards
where appropriate.
---Mike
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