🚀 go-pugleaf

In article <470pc4$b8k@panix.com>, fishman@panix.com (Harvey Fishman) writes:
> In <phrDH6ouJ.4Dz@netcom.com> phr@netcom.com (Paul Rubin) says
> 
>> Seagate's 4 GB "desktop" drive is the Hawk 4 (ST15230), which is
>> slightly slower and cheaper, and runs cooler because of its lower
>> spindle speed of 5400 rpm instead of 7200.  I sold my ST15150
>> recently because I didn't want to deal with cooling it, and I'll
>> probably get an ST15230 soon.
> 
> The capability that generally causes a drive to use lots of power and thus
> run hot is NOT spindle speed.  It is track-to-track seek.  It takes POWER
> to accelerate the mass of the head assembly from rest and to decelerate it
> back to rest and do both FAST.  Keeping something running at almost any
> constant speed is trivial.

	May I point out something obvious? Such drives run hot even when
there is no access to them for very long times. Guess where heat comes from?
Yeah, spindle motor plus electronics. The tighter the mechanical tolerance
on the spindle the snugger the fit and the more drive power needed to turn
it. And the motor electronics is heftier and draws more standing current.
	This assertion is trivial to verify.
	For those who prefer to "read more about it" then may I recommend
the tiny book for your drive. Here's an example for a Seagate Hawk 2 (2GB,
5400 RPM): Power 10W idle, 12W operating. Model number ST12400N.
	Joe D.

> Harvey
> 
> --
> ----------------------------------------------------------------------------
>  Harvey Fishman   |   It is easy to live by the laws that you agree with.
> fishman@panix.com |          But being law-abiding means obeying
>   718-258-7276    |        even the ones that you think are wrong.
>