"Powell" wrote in message
...

"Robert Morein" wrote

MTBF means NOTHING in this context. The term has
an unfortunately misleading name. Best left to
industrial engineers.

Why? It (MTBF) is a critical business factor used, among
other things, to establish insurance liability tables.


Disk drives today have a one year warranty....

Wrong.

See http://www.theinquirer.net/?article=5603


and a five year design lifetime.

Please provide supporting documentation.


From http://www.3dvelocity.com/reviews/wd2000bb/wd2000bb.htm
Component Design Life 5 years
Warranty Period 1 year 4




In my current systems, the fans are exposed to direct,
forceful ventillation from an adjacent fan.

For what purpose?--To **** you.
"current systems"... please define?-- ****ing machine