exFat support could now be implemented
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https://cloudblogs.microsoft.com/opensource/2019/08/28/exfat-linux-kernel/
this would mean that once accepted by the Open Invention Network’s Linux System Definition, which is a formality, exfat could also be used in the duet. -
But why?
I don't think it will have any advantages on Duet and pretty sure it is much more complex then FAT32 with will lead to higher CPU and memory usage. -
have a look at this
http://www.on-time.com/rtos-32-docs/rtfiles-32/programming-manual/exfat/benefits-of-the-file-system.htm
extFat is actually better on systems with weak cpu. -
I am not sure how much benefit would be gained if the SD cards come formatted with fat32 - we would need to format them to exFAT. AFAIK cards formatted with exFAT by default are >32GB (SDXC) which are still not supported due to limitations in the SD architecture on the MCU it only supports up to SD 2.0 (SDHC).
That said, once full integrated into the linux core, and if adopted as the default, then it will make accessing SD cards formatted for the Raspi easier.