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Burnt out SD or Dying Pi3?

Posted: Fri Oct 07, 2016 6:36 pm
by Cael
i just had for the first time w/ my Pi3, a Dead-dead MicroSD (upon connect i get "Incorrect function" and cant format/has 0.00KB as capacity) and i had it for awhile sure and its not unreasonable to think the microSD Up and Died.

but it was fine last night and all i did was plug in my Pi3. the pi wasnt booting so put it away went to bed to check it out further today. to see the microSD is toast. i dont want to buy a new MicroSD only to see it fry if the Pi3's at fault in someway.

Any way to test if its killing off MicroSD's other than get a new card and wait and see if it dies quickly?

Re: Burnt out SD or Dying Pi3?

Posted: Sat Oct 08, 2016 6:35 pm
by wh7qq
There are two main problems (at least) with the uSD card on the RPi. First, due to the popularity of the medium, the marketplace has been flooded with counterfeit cards. Pretty much any vendor, reputable or not, sells counterfeit media and I always make a point of testing before my first use with f3 (linux version of h2testw) even if I bought it from Amazon and it came in SanDisk packaging. I also avoid ultra-low prices. Such cards will have only a fraction of the labeled capacity.

The second problem is that if the RPi is shut down during a write cycle, it is possible that the uSD card will refuse to boot after that due to filesystem corruption. The solution here is to reformat the uSD card using the SD Association's free SDFormatter or gparted (linux) or a combination of both in some extreme cases. The card may show up even after running SDFormatter with no partition. In this case, gparted may be able to create a new partition table and then reformat to FAT32.

Another problem which I have yet to encounter, is that SD cards tolerate only a limited number of write cycles and so can wear out over time. I think this only happens in extreme usage cases.

In your case, it is probably one of the first two situations. It is very doubtful that your RPi is damaging the cards due to a malfunction, but do take care to observe a complete shutdown cycle before either removing the card or pulling the power plug. In a terminal, enter

Code: Select all

sudo poweroff
and wait for the 10 green led flashes to end. You can test and/or reformat the uSD card with a card reader that plugs into a USB port...every Pi owner needs one and they are cheap. I would buy another uSD card but try to salvage the old one as above. Stick to reputable vendors who will take the card back if faulty.

Re: Burnt out SD or Dying Pi3?

Posted: Sat Oct 08, 2016 10:27 pm
by Cael
wh7qq wrote:There are two main problems (at least) with the uSD card on the RPi. First, due to the popularity of the medium, the marketplace has been flooded with counterfeit cards. Pretty much any vendor, reputable or not, sells counterfeit media and I always make a point of testing before my first use with f3 (linux version of h2testw) even if I bought it from Amazon and it came in SanDisk packaging. I also avoid ultra-low prices. Such cards will have only a fraction of the labeled capacity.

The second problem is that if the RPi is shut down during a write cycle, it is possible that the uSD card will refuse to boot after that due to filesystem corruption. The solution here is to reformat the uSD card using the SD Association's free SDFormatter or gparted (linux) or a combination of both in some extreme cases. The card may show up even after running SDFormatter with no partition. In this case, gparted may be able to create a new partition table and then reformat to FAT32.

Another problem which I have yet to encounter, is that SD cards tolerate only a limited number of write cycles and so can wear out over time. I think this only happens in extreme usage cases.

In your case, it is probably one of the first two situations. It is very doubtful that your RPi is damaging the cards due to a malfunction, but do take care to observe a complete shutdown cycle before either removing the card or pulling the power plug. In a terminal, enter

Code: Select all

sudo poweroff
and wait for the 10 green led flashes to end. You can test and/or reformat the uSD card with a card reader that plugs into a USB port...every Pi owner needs one and they are cheap. I would buy another uSD card but try to salvage the old one as above. Stick to reputable vendors who will take the card back if faulty.
thats what i've always done but the card is Dead dead like i stated (0.00MB only in one of my 5 SDXC Readers the other 4 wont even Show up w/ it connected in Storage manager in Windows 10, and GParted live cant format it neither,i noticed some off special tape Peeled half way off the back of it. and teh cards old but not that old nor was heavily used either :/

Re: Burnt out SD or Dying Pi3?

Posted: Sun Oct 09, 2016 1:52 am
by wh7qq
i noticed some off special tape Peeled half way off the back of it. and teh cards old but not that old nor was heavily used either :/
What's with the "special tape"? Every SD card I have seen has painted or silk screened labels and no tape. Maybe you bought a batch of phonies? I have noticed that a few SD cards won't make proper contact in the RPi and need a small patch of transparent tape on the opposite surface but I have installed that myself.

Not to say it couldn't happen that a damaged Pi would eat its SD cards but the alternatives are so much more likely.

Re: Burnt out SD or Dying Pi3?

Posted: Sun Oct 09, 2016 1:12 pm
by Cael
wh7qq wrote:
i noticed some off special tape Peeled half way off the back of it. and teh cards old but not that old nor was heavily used either :/
What's with the "special tape"? Every SD card I have seen has painted or silk screened labels and no tape. Maybe you bought a batch of phonies? I have noticed that a few SD cards won't make proper contact in the RPi and need a small patch of transparent tape on the opposite surface but I have installed that myself.

Not to say it couldn't happen that a damaged Pi would eat its SD cards but the alternatives are so much more likely.
it had this lil Square adhevise that ended up peeling off

Image

Re: Burnt out SD or Dying Pi3?

Posted: Mon Oct 10, 2016 5:31 am
by wh7qq
I've never seen anything like that on legitimate uSD cards. What brand are they supposed to be? Where did you buy them?