Verifying SD Cards

I'm not up on the pi with this card yet. Turns out 64 GB has crossed a line and I'll have to do special formatting to use it.

On Wed, 4 May 2016 14:40:05 +0100, Ahem A Rivet's Shot Gave us:

Bob's yer uncle.

On Wed, 04 May 2016 15:14:39 +0100, "Kerr Mudd-John" Gave us:

I'm a doctor, Jim, not a memory card maker!

"Brain, brain.... what is brain?"

So far the card seems fine. But oddly enough I can't get the Samsung microSD to SD card adapter to work in my PC. I found an older 32 GB EVO card I had bought last year and that Samsung adapter doesn't work either. I measured them with calipers and they seem to be the same size. I thought the Samsung adapter was a bit thinner, but if anything the one that works is a couple thousandths thinner.

I don't have any reason to believe the two Samsung adapters are actually fake and the ones that work most likely *are* fake. I also have some Kinston branded adapters that also won't work.

This explains why I couldn't get any of the several 1 GB microSD cards to work last year. I guess I never realized it was the adapters and not the microSD cards. They all seem to work now in the two good adapters.

I'll have to see if I can get any of the "bad" adapters to work in the rPi which I just found today. Seems I had it squirreled away in an unmarked box.

Try cleaning the contacts on the microSD cards with an eraser. I find that helps with adapters sometimes. I don't know a way to clean the contacts inside the adapters. Maybe I could do that by busting the adapter open. I might try that sometime. I have lots of them that came with cards, and they're cheap enough anyway.

Get a bit of tape recorder head cleaning tape and wrap it around a micro-SD card.

I recommend the Rocketek USB3 SDCX/UHS-1 card reader, it has 2 micro SD and 2 full size SD slots, and appears as two drives. So you don't have to mess around with adaptors for micro SD cards, and its great for copying from one card to another a maximum speed.

---druck