I've had 2 machines in this series - the silver front, white side panels, the front intake grill, etc. - that have each had 2+ hard drives failed... all times, it was the lower hard drive when 2 drives were installed.
on 1 machine, the lower drive failed twice. I moved the drive that was in the top bay to the bottom, put the replacement drive on top... and the bottom one failed (yes, at that point, it was the older of the 2 drives, but still, 3 failures in a few years? some machines never have any failures.
and on the 2nd machine, the lower drive failed, got it replaced under warranty, and the newer replacement drive failed in that lower bay. the older top drive keeps running.
It's academic at this point - both machines are going away - if not a design flaw on the model, they are old anyway.
But curious if this rings a bell with anyone / am I paranoid. 5 hard drive failures on 2 machines in the same series over a few years just seems out of the usual.