RE: iSeries Disk Pricing

Rob,

Arms are arms, and on a database transaction system they frequently are
the most significant limiting factor on performance.  In the case of
currently marketed or announced disk drives for the iSeries, the 8.5 GB
and 17 GB drives have the same performance metrics.  My point was
practical, as opposed to theoretical.  For those transaction-based
systems which have excess capacity using 8.5 GB drives because disk-arm
count was a performance limiting factor, they will need to purchase the
same number of 17 GB drives to duplicate the same performance.

Those systems will save no money based on the price reduction of the 17
GB drives.  Yes, they will have capacity to archive data, keep more
history, and other good stuff; but they will not save money.

IBM may announce new hardware which makes your point, but as of this
time, they have not.

Regards,
Andy Nolen-Parkhouse

> Subject: RE: iSeries Disk Pricing
>
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> Everybody keeps chanting the arms mantra as if a bank of original 10mb
IBM
> PC hard drives would out perform a 8gb iSeries drive.  I argue that if
> they keep improving all of the other performance metrics of drives
then
> you may not need as many arms for the same amount of data.
>
> Rob Berendt