Tesla MCU1 eMMC failure

https://tesla-info.com/blog/tesla-mcu1-emmc-failure.php

 

 

Nice find!

 

Who are they using for engineers?  Even Armbian knew this since what... 2016, at least?

 

Maybe I add a link to this article from Performance tweaks section of docs (even Tesla got this wrong...)! 

Has been known for a while from the Tesla's. They just didn't confirm until now.
From January https://teslamotorsclub.com/tmc/threads/consolidated-emmc-thread-mcu-repair-black-center-screen.181124/
There are only so many write cycles. Normal when swap is used that it dies after a few years.

I use swap on NVMe and replace my NVMe about every year. Rather have a lot of extra usable memory available than a long lifetime. 

Tesla's own fault...

 

1) 8GB eMMC is going to have a fair amount of writes if logging direct to disk - and each write there is two writes, one to erase a block, and one to rewrite the entire block.

2) Reminds me of a handset vendor about 7 years ago, where they would write a time value every second to eMMC - after about 9 months, the device would die...

 

sfx