On 04/10/2018 02:18, bob prohaska wrote:
> I've just ordered a Samsung Evo + 128GB microSD card, basically as an
> experiment. It'll be close to twice the capacity I need, maybe that'll
> help the working life. It claims a uhs3 speed rating, but I'll believe
> that when the package arrives.

When used for large file operations with a USB3 card reader, it will be
very quick. As its a Samsung it will have OK performance with the
Raspberry Pi, but no faster than any other class 10 card, and probably
not as good as an older Samsung class 4 or 6.

> The 16 GB card that failed actually lasted a rather long time; about
> six months of continual compiling, finally run up to over 90% capacity
> at the time it quit. In my environment that's probably an order of
> magnitude more writing than will happen in real use.

The 128GB card will last longer a bit longer, but its not the best
solution. A 128GB SSD would last for just about ever, and be vastly
quicker for random access operations, particularly compiling.

The only reason not to get it would be lack of space for an external
drive, in which case a Samsung USB3 bar would give almost the same
performance as an SSD from the Pi, and much better life than an SD card.

> Is there any chance re-partitioning the failed device might wring a little
> more life out of it? Badblocks reports all bad blocks, but I was able to
> write a small file on the DOS partition, so it's not totally stuffed.

Once its found to be unreliable, bin it. Anything else is just inviting
grief!

---druck

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