[PLUG] Weird microSD failure

[Jim Karlock]

>My initial attempt to google this was unsuccessful (most people point
>out the write protect tab, not my problem).

Bad switch on the write protect tab? (The tab operates a tiny switch.)

thanks
JK


At 01:25 AM 3/6/2018, you wrote:
>I started playing with my Pine 64+ quad-core ARM64 board again
>recently.  I have a 16GB Samsung EVO microSD card I was using
>previously.  I started out by zero'ing it:
>
>   dd if=/dev/zero of=/dev/sdc bs=1M status=progress
>
>which seemed to finish fine.  But when I remove and re-insert it, it
>still has data on it.  Double-U Tee Eff?  I have tried the same
>process on three different machines with different methods of
>connection (in an SD adapter in a USB-SD reader; in the SD adapter in
>a laptop SD slot (probably still USB internally); and directly in a
>microSD slot in a second laptop).
>
>I get no warning about being read only.  The writes seem to occur
>successfully and fully complete.  I sync before I remove the media,
>plug it back in and all the old data is still present.
>
>My initial attempt to google this was unsuccessful (most people point
>out the write protect tab, not my problem).
>
>Any similar experience, and/or clues for recovery?
>
>Thanks in advance.
>
>--
>Russell Senior
>russell at personaltelco.net
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