SD Card corruption again, again
-
What kinds of cards? I don't think I've heard of anyone going through that many before.
-
@Phaedrux Samsung 32GB class 10, not to mention every single card that has come with the boards.
-
Do you use logging to the SD card?
-
@Phaedrux I do.
-
That's a lot of write wear to the SD card if used long term. If it's something you want to continue using consider getting an industrial SD card with higher write endurance.
-
@gnydick said in SD Card corruption again, again:
@Phaedrux I do.
It is much cheaper to setup an UPS than to have logging turned on always
-
what does an ups have to do with logging?
-
@Phaedrux it's not that much writing, really. the cards have write leveling. considering it's a 32GB card, it will take a VERY long time to wear down the card.
-
How corrupt are the cards? Can they be reformatted and reused or are they unusable once they fail?
-
Silly question, but where are you buying them ?? I've had a couple permanently fail, and even though they were supposedly 'branded' items, I doubt they were as they were a lot cheaper than others.
Also try connecting them to a PC, whether Windows or Linux, & re-formatting them, I've resurrected a few that way....
-
@Veti said in SD Card corruption again, again:
what does an ups have to do with logging?
I don't see any other reason to have logging "always-on" except if you want to have data to continue after power loss. This is better solved by UPS. For any other reason, it would make sense to log from time to time to check issues if you have them, but not always.
32G is a big card, you are probably writing over and over the same place if they are getting worn out quickly (many will lock the card for writing into read-only mode when they encounter write issues and cant remap the blocks any more, many will not fail on writes but silently ignore them). Possible solution would be to either never delete log files and only create new ones or always append to a log file and not truncate it ever. I have no clue how M929 actually work, never had a need for it, I have enough issues with crappy SD cards to force them to take the logging data too... tried many years ago with marling and gave up after few dead cards
-
powerloss recovery is M911 and not debugging.
those are two different things. -
@Veti yes, my mistake, you are only logging basic stuff (Start, stop ..) that should not eat up the SD card, not enough "traffic" ..
-
i think it logs every move. so its a lot
-
@Veti it does not log every move. that would be silly.
-
What level of logging are you using? What is the command used?
-
@Phaedrux
M929 P"eventlog.txt" S1 -
The problem doesnt come from the boards.
I use multiple duet3d boards with all kind of sd cards and never had that issue.
You might have fakes from amazon/ebay: They look 100% like the real one but are 8g instead of 32g, and as the board think they are 32g it keep writing and destroy the card.I even once bough a fake from walmart. No joke. It is hard to find good stuff now.
-
@jrockland i don't think < 1GB would do that.
-
@gnydick depend how many projects you have on those cards.. my cards usually run around 12+ g when I back them up. But im running a ton of high def projects..
