Running slow after making backup

BradleyTO

So I wrote a big long explanation for my question and accidentally erased it so here is the short form

I had a 32 GB card. Ran beautifully. Made an img file with it to transfer everything over to a 500 GB card. Description:
Type: TF (Micro SD) card
Speed class: 10, UHS-1
Read speed: up to 30MB / s
Video speed grade: V30

Wrote the img to the new card. It now runs insanely slow on the new card. It also wont let me expand the sd card on the retropie (havent tried on the computer yet)

Any idea of why this would be happening? Is the card too big? If the description was correct it should be running fine. Any tips or advice? Thanks!

ReadyPlayaWon

@BradleyTO said in Running slow after making backup:

Read speed: up to 30MB / s

that's pretty slow ... my Sandisk Micro SD card claims "up to 100MB /s"

ran a speed check on it in Windows ... 81 MB /s Read and 23 MB /s write

BradleyTO

@ReadyPlayaWon oh really? Ok than the card is just too slow. That explains why it was cheap lol.

Thanks for the quick reply I will go back to the smaller card and maybe just keep my movies on a usb instead.

I wanted it all in the storage as one but will sacrifice that for better speed lol

BuZz

@BradleyTO If it was cheap, it may not be 500GB at all - could well be a fake (actually it's very likely depending how much you paid and where you got it from). You can check it on a PC.

https://oscarcao.com/blog/2015/10/24/how-to-check-whether-a-micro-sd-or-sd-card-is-real-or-fake/

Clyde

You can also check it on RetroPie. The tool F3 (Fight Flash Fraud) will fill the card with 1GB-sized files and read them again afterwards, shows the read/write speed, and checks how much can be written and retrieved correctly.

sudo apt install f3
f3write /path/to/check
f3read /path/to/check

Replace /path/to/check with the path to check, e.g. /home/pi.

See https://github.com/AltraMayor/f3/blob/master/README.rst for more instructions and examples.

BuZz

@Clyde Wasn't aware of that tool. Cheers.