RHEL3 and SAS5/iR: very bad performance

Ben Scott dragonhawk at gmail.com
Wed Jan 24 14:01:55 CST 2007


On 1/24/07, Giulio Orsero <giulioo at gmail.com> wrote:
> My problem is that a PE840 with SAS5/ir costs more than one with just
> a single disk, but the one with a single disk is by far more
> performant.

  What's the performance of the single-disk system with a single disk failure?

  RAID provides availability.  The operating assumption is that
loosing system availability costs more than any performance impact.
If that's not the case, don't buy RAID.  But you better be right about
your downtime costs.

-- Ben



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