EMMC write slow

VIM1 Ubuntu
1

Hi,
One VIM1 that has been running Ubuntu for years got some weird problems (impossible to execute some sh files for example). Decided to overwrite EMCC with newer image from a sd-card with Krescue.

The write process started normally, but got slower and slower. When a whole hour was spent, the writing speed was already dropped to 240 bytes per second(1). I canceled the process (about 90% of the image was written).

What could this mean, is the EMMC weared out? There was a constant log file writing going on, during the useful worktime. Can I make some tests to find out?

If it is EMMC problem, could the bad areas be somehow excluded?

2

More than likely yes.

Its best to save log files on the SD or even better SSD on the USB port.

Not really.

Can you run from SD card?

3

Krescue runs fro SD card.

Seems EMMC it totally broken. Krescue write/read test does not work at all on this.

I will try to shot down logging in the future if there is nothing suspicious going on.

4

You can run it from SSD on the USB port. That will be much faster than SD card.

5

booting from USB has never succeeded for me. probably something is missing (uboot?) in the khadas ubuntu images for VIM1.

6

You will have to start uboot using SD card then switch to USB ssd for the rest.