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Raspberry Pi vs. MicroSD: Another One Bites the Dust

The Raspberry Pi running the MPCNC recently seized up with baffling symptoms, which generally indicates the poor little MicroSD card serving as a “hard disk” has failed:

Defunct Sandisk Ultra 32 GB MicroSD
Defunct Sandisk Ultra 32 GB MicroSD

I managed to open a terminal emulator, whereupon all of the non-built-in shell commands couldn’t be found.

Proceed as before: binary-copy the entire MicroSD card to another one, pop it in the RPi, and it’s all good again.

For the record, the new card is an unused Samsung Evo Plus. I do not understand the difference between the “Evo Plus” and “Evo+” branding, other than to suspect one of being a very good fake.

In round numbers, MicroSD cards seem to last a year under what seems like not-too-demanding service; I’m not running the MPCNC all day, every day.

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  1. #1 by David Schultz on 2019-08-20 - 10:55

    My RPi gets more than a year and is running a couple of logging programs. But they add data to a RAM drive tmp folder which gets copied every 2 hours. It has been running since early 2015 and is on its second card. Currently a Sandisk Ultra 4GB.

    http://cosmac.dlinkddns.com/

    Keeping the dynamic DNS updated is more of a problem.

    • #2 by Ed on 2019-08-20 - 18:09

      I hope the Raspbian folks tidied up all the log-to-disk stuff with in-RAM drive overlays, because I haven’t a clue how to integrate all the suggestions I’ve read. A year or so seems reasonable for a device never intended for use as a “hard drive” in a real computer.

      On the other paw, the video-rated MicroSD cards in the bike cameras work wonderfully well. The Sony HDR-AS30V, in particular, has been chewing on the same 64 GB card for two years, after dependably killing general-purpose cards in a few months.

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