Re: Hardware question

I've got a customer using a 3 drive RAID set on a 520; they were
previously on a small 170. The performance is light years more than
they need - the only person who notices the difference is me when I
compare it to other 520's I've worked on. It is unlikely that they
will ever get close to any of the CPU or disk limits on this machine.

Although I did not develop or install the config, the fact is they
would not get a single benefit from having another disk drive so why
bother with it ?

While I agree that sometimes saving money on a disk f\drive here or
there is simply penny pinching, if you took your logic to it's
ultimate conclusion we'd be insisting all our customers installing
595's with mirrored disk.

On Fri, Jan 14, 2011 at 7:26 AM, <rob@xxxxxxxxx> wrote:

You bring up a interesting point - if you are coming from an ancient slow
machine then shouldn't a newer machine in itself, be a very significant
increase, even if it is seriously throttled down?  The answer is you are
probably correct.  I've argued against a three drive raid set.  Even
though it is supported, one should use four or more drives.  This math
holds true on platforms other than i also.  However the person I was
talking with was coming from an old S/36 and remarked it was going to
already blow the doors off of what they were running and why upset their
cost figures with yet one more disk drive?  The OS alone was going to take
more space than their old S/36 with all it's os and data.

A counter argument is that, at some time, the system will not be compared
with the old S/36, but it will be compared with contemporary hardware. Yes
the Model T may have gone from one city to the next faster than John
Wayne's stallion but that fact has no bearing when comparing it with a
2011 Dodge Challenger.

And, since these people have a history of keeping their hardware for two
decades, do you really want to start them out throttled down?  Or do you
want them to have something that will take on new applications?


Rob Berendt
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