Hello
  While I'm certain you realize I was just trying to expose choices rather
than recommend anything specific, I can attest to the value of utilizing
old AT supplies for driving the various motors in a PC and particularly to
gaining the ability to switch them on and off  separate from the mainboard.
 I certainly agree that it can be a poor tradeoff to try to use many
extremely small drives to add up to a large one's capacity, although 23Gig
drives ( especially 4 of them in RAID ) are sufficient for many home
computers.  It may be worthy of note that the highly acclaimed breakthrough
Western Digital SATA professional drive, the Raptor, is only slightly
larger, although they are planning larger versions due to the
"hit" status it has achieved as the best scsi competition to date
in performance, warranty/reliability, and cost.  So 23 Gigs isn't really
small just yet at least for some applications.  Let the buyer apply his own
priorities as we all have our idiosyncracies as to what we value. 
 In fact as per your last paragraph, I still consider my Class A Pentode
and Class A Triode amplifiers well worth any tradeoff when I really want to
just listen to music.  However I must concede that as I grow older and
surrounded by family and neighbors I must settle for my car as the one
place I can still listen at "proper" sound pressure levels
although I most definitely do not go in for the falsely boosted bass so
common in otherwise reasonably decent car stereos of the young these days. 
Here again though is the condition of design standards usually best served
by considering the whole system.  Often a dollar in speaker efficiency is
worth 4 dollars in amplifier power or as you pointed out a single 200G
drive versus the equivalent number of 23 Giggers.

Jimmy



> Another way to think of the real environmental costs to some of the
> old computer gear, relative to the new: A CRT monitor and typical P4
> system uses as much power and put out as much heat in a day, if
> operated 24/7, as a 120v space heater puts out in 2-4 hours. The
> former is taken for granted in the summer. The latter would not be.
> 
> Sound is best thru thermionic valves, preferably operated in triode
> mode, but even here there's a brilliant screen drive mode of operation
> in class B that lowers power consumption, extends tube life, and
> reduces AC costs.. 
> 


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