Disk IO benchmarking

[Sarunas]

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Ben Scott wrote:
> On Jan 17, 2008 11:14 AM, Mark Komarinski <mkomarinski at wayga.org> wrote:
> <...>
>> We stuck with a hardware card mostly for ease of setup, administration, and how
>> easy it was to locate and replace failed drives ...
> 
>   I typically prefer hardware RAID for the same reasons.  Especially
> booting under fault conditions.  I can never really bring myself to
> trust that with software RAID, given all the weird problems I've seen
> with boot loaders over the years.  (But then, I've always worked on
> very heterogenous hardware.  If I had a stable platform to test
> against, I might have higher confidence.  But when every BIOS has its
> own unique failure modes...)
I'm inclined towards hardware RAID for similar reasons. It would be nice
however to have an idea of the performance differences, if any, on that
particular system just in case, also theoretically.

As far as the usual workload on a system and CPU loads from sw RAID,
perhaps running a kernel compile or a super-smack on MySQL server might
give a more realistic situation as opposed to the benchmark-only.

Sarunas Burdulis
Systems Administrator
Department of Mathematics, Dartmouth College

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