#123 - Monday Reflections on reliability

Its a cool Monday after Easter in the Alleghany Highlands. My computer, printer and monitor started up without incident. Now that may not seem like a huge Woohoo moment but computer reliability is very important to the world.

Back in the early days of hard drives, keeping them running over a year was a big accomplishment. Just last week a customers hard drive crashed after 5 years of pretty heavy use. The drive sent out warning noises and even some funky error messages before passing on. The customer wanted to know why the hard drive ceased to function. The expectation has changed from I know its going to crash to Why do they crash?

Hard Drives are the key to all PCs. They are disks of metal spinning very fast (7500rpm in a desktop) with a magnetic head positioned millimeters from that spinning disk. Several mechanical and electrical components that can (and will) fail. The tolerances are very fine, the machining of the components exacting and fit and finish precise. Mean time before failure is 4-5 years of continuous operation. Modern marvels if you ask me, but still the main reason PCs crash.

Now if a desktop hard drive is amazing think about the laptop hard drive. One third the size with teeny tiny components. They get bumped all the time, put in strange positions and subject to extremes in temperature seasonally. Mean time before failure is approximately the same in portable hard drives. Now that is amazing. Actually a laptop hard drive is fairly easy to replace and if you get a new one they usually are faster speeding up the whole laptop.