Re: The inferiority of Maxtor

Rod Speed wrote:

CJT <abujlehc@xxxxxxxxxxx> wrote

Rod Speed wrote

CJT <abujlehc@xxxxxxxxxxx> wrote

Rod Speed wrote

larry moe 'n curly <larrymoencurly@xxxxxxxxxxx> wrote

Rod Speed wrote

larry moe 'n curly <larrymoencurly@xxxxxxxxxxx> wrote


I measured Hitachi/IBM, Maxtor, WD, and Seagate 7200 RPM HDs
during idle and sequential reads, and in 24-25C ambient air the
temperatures of their aluminum castings were nearly the same,
except an 80GB Seagate with a metal cover over its circuit board
ran about 4C hotter.


That obviously varys with the cooling they are getting.


You'll find some get stinking hot surprisingly quickly
when run loose on the desktop when debugging things.


Removing the cover made it run as cool as the others.


Not if you run it loose on the desktop it doesnt.


I did run all of them on a desktop, actually with the circuit
boards facing upward and the drives sitting on horizontal pencils
to allow for air circulation. I put the drives near the center
of the desk and rearranged them because I found that even small
changes in air flow would affect temperatures (a CPU fan 4" away
made a chip on a Maxtor cool from 68C to 55C, and simply sitting
the drive vertically had a similar effect).


Then I dont believe your claim that they all ran at the same temp.


As I recall, they all consume about the same power,


No they dont. The MAXIMUM specified in the
datasheets are similar, a different matter entirely.


Average, too, as I recall.


Nope, not with most of them on that particular power use.


so they should all be about the same temperature if given the same
cooling.


Wrong again when some drives are designed to get more
heat away by conduction to the drive bay stack metal.


Those get stinking hot when run loose on
the desktop with no airflow over the drives.


That's irrelevant, unless that's how you mount your drives.


No it isnt, its the evidence that your claim that the power
consumption is all that matters drive temp wise is just plain wrong.

The source of the heat is the power consumed.

Consume the same power, get the same heat. Cool them the same,
and that will result in the same temperature, other than minor
differences in the effectiveness of their heat sinks.


OTOH the hottest chips I could measure were on the Maxtor
(couldn't measure WD chips because they were on the inside),
both the TI DSP and the six tiny chips that control the motor
and head movement. Those small chips reached 68-70C
during reads, about 5-10C hotter than the hottest chips
on Seagate and Hitachi/IBM drives. Maxtor said that was
OK, and while the chips are rated for 125C, apparently
some Maxtors and Quantums have failed because of them..


And the Fujitsu MPGs in spades.





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