<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p>Well, as a matter of fact, I myself told myself this, based on my
anecdotal experience of 45 years in the field. Since it's an
anecdotal observation, it can't be taken as scientific. Moreover,
your point is, of course, correct. And as soon as I sent the
below, I wanted to qualify it both in terms of manufacturing
purpose and duty cycle.</p>
<p>Even with moving parts, 'professional' equipment will typically
last longer than consumer. I have a highly venerable IBM X8668
server from about 2000 that is fine, yet it has moving parts; a
six drive RAID 5 and the fans. Those drives have never broken; I
think we've had to blow out a fan. <br>
</p>
<p>However, I should qualify this with the fact that the unit was
almost never shut off ever for over 12 years and was on a triply
redundant conditioned power supply during all that time. So, no
power up flexing, Etc. As a matter of fact, any machine that I
care about here is on a conditioned power supply (at least an APC
Smart UPS). My remark might have been better put in that context;
the power up surge flexing is what eventually will do anything in.<br>
</p>
<div class="moz-cite-prefix">To be fair, you're not the first person
who has retorted to me about my squatness with regards to
electronics, my brother (who does the hardware support) being very
high on that particular list. I'm quite happy (often delighted)
to blithely reply, "Yeah... They don't do much without me
programming them, do they?"<br>
</div>
<blockquote type="cite"
cite="mid:6db9976b-a104-12b0-e5e4-5bf7c988c602@neurotica.com">
<hr width="100%" size="2">On 1/22/21 11:53 AM, Dave McGuire wrote:<br>
<br>
I don't know who told you that, but he/she knows jack point
squat about electronics.
<br>
<br>
Materials migration and diffusion across junctions causes
semiconductor components to fail, tin whiskers cause shorts, some
types of capacitors dry out and/or have their electrolyte
deteriorate or crystallize, resistors drift, heat/cool cycles
cause PCB flexure resulting in cracked solder joints, corrosion in
air creeps into connector pin interfaces and forces pins apart,
the list goes on and on and on.
<br>
<br>
To be fair, some of the above-listed failure modes do in fact
involve things moving, though imperceptibly so, my point stands.
<br>
<br>
-Dave
<br>
<blockquote type="cite">
<hr width="100%" size="2">On 1/22/21 11:41 AM, Thomas DeBellis
wrote:
<br>
<br>
10 years used to be nearly unheard of for retail machines with
moving parts. When nothing is moving, then supposedly there is
nothing to burn out. </blockquote>
</blockquote>
</body>
</html>