On Mon, 2026-07-20 at 17:32 -0400, Frank Bures wrote:
> I operated disk arrays with hundreds of HDD's in 00's.  I had a peculiar 
> experience with WD HDD's that would simply start to disappear.  There was 
> nothing interesting in SMART, the drive would just disconnect itself from 
> the array.  It would suffice to pull the drive out and plug it back in and 
> it would populate itself again.  However, the drive that started to do that 
> would ultimately "disappear" permanently, so we just replaced them 
> preventatively.  Unfortunately, as the drive would seem to be OK during 
> tests, we were never able to apply WD warranty, unless the drive 
> "disappeared" permanently.

One contributor to device death is handling.  There's the obvious of
physical shock (being banged about in transit, installation, and
operational vibration), and the less obvious one of static electricity.

People tend to think of if static shock is going to kill something
it'll do it while they'll handle it, and it'll be dead at first test. 
But that's not the case according to manufacturer testing that we were
told about while studying electronics.  They'd found that it weakened
things, so that a device that would normally run 10 or 20 years before
things like slight manufacturing defects eventually cause a problem,
and natural chemical degradation of the parts spoils it, might fail in
only 2 or 3 years, well before the device became outdated and was
willingly replaced.  And, of course, when something fails in 3 years
time, you rarely associate that failure with how you handled the drive
during the build.

For some users, a three-year lifespan doesn't bother them.  They want
something bigger, faster, better, and a three-year-old computer is
ancient in their eyes.  I don't feel that way, it's wasteful, and
annoying having to do so much maintenance work on servers.

Electronic devices are forever being stressed by low-current high-
voltage static discharges.  You have a PC on the desk in a carpeted
room, you walk over and start using it.  If you haven't completely
discharged yourself through the chair and table, and the table hasn't
discharged itself through the PC sitting on, you're going to discharge
yourself through the keyboard or mouse.

You wipe the dust off your screen or keyboard, you're generating an
electric charge.  You blast the dust out of your PC with an annual
clean-up...

It all has a cumulative effect.



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(yes, this is the output from uname for this PC when I posted)
 
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