515 not performing to full rating due to disk arms?

[Scott Lindstrom <SLindstrom@xxxxxxxxxx>]

In reviewing some vendor proposals for a new system I have one vendor not
recommending a 515 with its maximum of 8 disk drives (mirrored).  They say
at this number of drives the normal CPW rating of 3800 is driven down to
800.

I have never heard of a CPW rating being driven down that far before due to
disk arm limitations.  Is this something anyone else has heard or
experienced?  (We don't need the 3800 CPW - it's overkill for us - but
don't know if coming down to only 800 would be a problem).

Scott

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