linguini1 commented on issue #15840:
URL: https://github.com/apache/nuttx/issues/15840#issuecomment-2660237180

   > how about `fsync(fileno(fp))`?
   
   Thank you! I think this should solve my issue!
   
   However, my other question I am still wondering about: when during normal 
file operations can I expect the file to be synced to the "disk" (in this case 
SD card)? Regular `fopen`, `fwrite`, `fclose` sequence still leaves a 
completely blank log file. Surely `fclose` should trigger a synchronization to 
make sure no information is lost. How come after running `fwrite` for many 
iterations there is still no file contents actually written to the card?


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