Tino Schwarze wrote:
> On Mon, May 05, 2008 at 01:00:19PM -0500, Les Mikesell wrote:

> 
> I've yet come to a conclusion regardin HW or SW RAID. I've used both.
> I've had both crash on me and recover from crashes.

I'm in the process of configuring a cluster front end to buy.
It will need ~10TB of disk space. I'm also going back and forth
about HW vs. SW RAID.

I suspect one advantage of HW RAID when you have a large number
of disks is that the host doesn't feel the overhead of all the disk
I/Os. The RAID controller takes care of all this so the host
sees many fewer I/Os. In an I/O bound environment I suspect
this could be a considerable advantage.

I've used 3ware controllers on Linux a lot. I agree that both
the web site and the documentation isn't as good as it could be.
However, their tech support is **Excellent**.

What I'm probably going to do is to put a 3ware controller
in the frontend box, and then use software RAID in the box
that will back it up. That's a good compromise.

Cordially,
-- 
Jon Forrest
Research Computing Support
College of Chemistry
173 Tan Hall
University of California Berkeley
Berkeley, CA
94720-1460
510-643-1032
jlforrest AT berkeley DOT edu

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