(08-17-2017, 04:52 AM)kometchtech Wrote: In this case, should we suspect hardware (Rock 64)?

(08-17-2017, 05:00 AM)MarkHaysHarris777 Wrote:

(08-17-2017, 04:52 AM)kometchtech Wrote: In this case, should we suspect hardware (Rock 64)?

No.

... always suspect a bad, cheap, defective or fraudulent SD card;  its that simple.

We recommend Samsung 32G Class 10 Evo Plus cards !   Also, you can test your cards for fraud;  there are many fraudulent cards out there;  please read this link.

(08-17-2017, 05:48 AM)kometchtech Wrote:

(08-17-2017, 05:00 AM)MarkHaysHarris777 Wrote:

(08-17-2017, 04:52 AM)kometchtech Wrote: In this case, should we suspect hardware (Rock 64)?

No.

... always suspect a bad, cheap, defective or fraudulent SD card;  its that simple.

We recommend Samsung 32G Class 10 Evo Plus cards !   Also, you can test your cards for fraud;  there are many fraudulent cards out there;  please read this link.

Thanks for the reply.

Is Samsung EVO plus? If EVO is useless, I feel pretty severe with regard to the corresponding microsd.
Let's buy Evo plus for the time being and try it.

Best regards.

(08-17-2017, 06:37 AM)stuartiannaylor Wrote:

(08-17-2017, 05:48 AM)kometchtech Wrote:

(08-17-2017, 05:00 AM)MarkHaysHarris777 Wrote:

(08-17-2017, 04:52 AM)kometchtech Wrote: In this case, should we suspect hardware (Rock 64)?

No.

... always suspect a bad, cheap, defective or fraudulent SD card;  its that simple.

We recommend Samsung 32G Class 10 Evo Plus cards !   Also, you can test your cards for fraud;  there are many fraudulent cards out there;  please read this link.

Thanks for the reply.

Is Samsung EVO plus? If EVO is useless, I feel pretty severe with regard to the corresponding microsd.
Let's buy Evo plus for the time being and try it.

Best regards.

Evo is OK but beware there are a huge amount of counterfeits on offer or sub standard product.
Evo just slower and the price saving isn't really worth while but that card you have could be defective.
Have you tried writing an number of large files to it and used it on something else?

(08-17-2017, 06:50 AM)kometchtech Wrote:

(08-17-2017, 06:37 AM)stuartiannaylor Wrote:

(08-17-2017, 05:48 AM)kometchtech Wrote:

(08-17-2017, 05:00 AM)MarkHaysHarris777 Wrote:

(08-17-2017, 04:52 AM)kometchtech Wrote: In this case, should we suspect hardware (Rock 64)?

No.

... always suspect a bad, cheap, defective or fraudulent SD card;  its that simple.

We recommend Samsung 32G Class 10 Evo Plus cards !   Also, you can test your cards for fraud;  there are many fraudulent cards out there;  please read this link.

Thanks for the reply.

Is Samsung EVO plus? If EVO is useless, I feel pretty severe with regard to the corresponding microsd.
Let's buy Evo plus for the time being and try it.

Best regards.

Evo is OK but beware there are a huge amount of counterfeits on offer or sub standard product.
Evo just slower and the price saving isn't really worth while but that card you have could be defective.
Have you tried writing an number of large files to it and used it on something else?

Thank you for reaction.

According to the information you hear from Samsung EVO, there seems to be various problems. Certainly, silicon power is different, but for EVO it is purchased from overseas and imported.
I tried to check with f3 tool heard from MarkHaysHarris777, but the microsd card itself seems not to be damaged (the file system was not broken). However, the write speed is 10MB, which seems to be just like Guaranteed by Class10 for the time being.

Let's order EVO plus at a domestic store for the time being.
So I will check again.

Once you have obtained EVO plus you will contact the results.

Thank you for your advice.

Best regards.

(08-17-2017, 07:17 AM)stuartiannaylor Wrote:

(08-17-2017, 06:50 AM)kometchtech Wrote:

(08-17-2017, 06:37 AM)stuartiannaylor Wrote:

(08-17-2017, 05:48 AM)kometchtech Wrote:

(08-17-2017, 05:00 AM)MarkHaysHarris777 Wrote: No.

... always suspect a bad, cheap, defective or fraudulent SD card;  its that simple.

We recommend Samsung 32G Class 10 Evo Plus cards !   Also, you can test your cards for fraud;  there are many fraudulent cards out there;  please read this link.

Thanks for the reply.

Is Samsung EVO plus? If EVO is useless, I feel pretty severe with regard to the corresponding microsd.
Let's buy Evo plus for the time being and try it.

Best regards.

Evo is OK but beware there are a huge amount of counterfeits on offer or sub standard product.
Evo just slower and the price saving isn't really worth while but that card you have could be defective.
Have you tried writing an number of large files to it and used it on something else?

Thank you for reaction.

According to the information you hear from Samsung EVO, there seems to be various problems. Certainly, silicon power is different, but for EVO it is purchased from overseas and imported.
I tried to check with f3 tool heard from MarkHaysHarris777, but the microsd card itself seems not to be damaged (the file system was not broken). However, the write speed is 10MB, which seems to be just like Guaranteed by Class10 for the time being.

Let's order EVO plus at a domestic store for the time being.
So I will check again.

Once you have obtained EVO plus you will contact the results.

Thank you for your advice.

Best regards.

It could be that Rock64 maybe a bad one but Flash and SD is so dodgy at the moment.
I got 2 Sandisk Cruizer Blade 32GB good price off ebay.
Packing and product looks perfect but complete rubbish and not even sure if its just a bad batch from Sandisk.

(08-17-2017, 09:16 AM)fire219 Wrote: Personally, this sounds more like a power supply issue (voltage too low, causing glitches).

What power supply are you using?

(08-17-2017, 11:35 AM)MarkHaysHarris777 Wrote:

(08-17-2017, 09:16 AM)fire219 Wrote: Personally, this sounds more like a power supply issue (voltage too low, causing glitches).

What power supply are you using?

This might be a power supply issue, indeed .  

...  I need to make a comment on why Evo Plus.  If the card actually supports Evo  then the card will work better in a classical environment;  and also ( believe it or not ) run faster in general.  To put this more succinctly, the Evo Plus cards are a higher quality card and less likely to be prone to malfeasance ( no promises, just generally true ).

It is also important to get your cards from a reputable supplier;  if you buy one of the cheap cards on-line for that unbelievably low price , well , you're just asking for trouble ( I mean this with no sarcasm and ver genuinely ).

Fire219 makes a good point;  our two biggest problems are PSU, and SD card.  The PSU we recommend ( for various reasons ) is the switching supply on the pine store rated for 5v @3000ma;  3.0A.  DO NOT use a charger, and do not try to use a cheap linear supply or one rated for less than 2500ma.  YMMV,  and I'm not arguing about it.  If you don't want to do either of these recommendations, ok.