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RaspberryPi Zero2W
MarkMLl:
--- Quote from: TRon on December 22, 2023, 02:16:32 pm ---I do not have any issue with my pi's either but it seems that either there are people that have a terrible choice in selecting a proper SD card manufacturer/brand
--- End quote ---
https://www.bunniestudios.com/blog/?page_id=1022 is a good read under the circumstances.
In practice, my recollection is that there were issues on the Pi-3, even after you'd told it to boot from an external medium, if you wanted to implement your root device using software RAID or with an encryption layer. I forget the detail, but allowing that the initial boot code was in 32K of internal ROM I don't think it was fixable.
MarkMLl
dbannon:
--- Quote from: TRon on December 22, 2023, 02:16:32 pm ---
I do not have any issue with my pi's either but it seems that either there are people that have a terrible choice in selecting a proper SD card manufacturer/brand or do not fully understand that when you log data every 2 milliseconds that you are not suppose to write that log to a file on a SD-card that every 2 milliseconds. That will kill your SD-card for sure within a couple of weeks, if not days.
--- End quote ---
Back when I was using a Pi 1, I was also having quite a lot of (external) power problems. I was surprised to note that the Pi seemed to cache writes for close to 24 hours. So, if the power goes off today, no data was saved after some time yesterday. Unless you call sync....
So, I guess that was to protect the sdcard from just what we are talking about. But that is not going to help when we get a page fault ! So, using it for swap is the real danger.
David
Mark20:
I see some Rpi4 clones that have 32GB of eMMC flash onboard; do you know if this kind if flash solve the wear problem ?
MarkMLl:
A few seconds Googling turns up https://forums.raspberrypi.com/viewtopic.php?t=358782
However I have no personal experience of that, and I'd suggest that "clone" behaviour might or might not be the same as the "real thing".
On reflection, I do have a very vague recollection of something which might have been an eMMC module on the back of an RPi clone badged (I think) Acer, which failed for unspecified reasons within weeks.
I'd also remind you of https://hackaday.com/2021/02/11/tesla-recalls-cars-with-emmc-failures-calls-part-a-wear-item/ as a cautionary tale.
MarkMLl
TRon:
EMMC suffers from the same wear leveling issues, especially because the capacity of the devices for these kind of SBC is very small (in comparison). I do not have fond memories of emmc and avoid it like the plague (but perhaps things have improved over time).
I would be wary if it's soldered down on the board as that makes it nearly impossible to replace unless you have the equipment and are familiar with replacing such parts.
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