On 9/23/2015 2:45 PM, Eric Auer wrote:
> Hi again,
>
>> Maybe some DOSers want to have a look at the exFAT driver code,
>> to check complexity: https://github.com/dorimanx/exfat-nofuse
> Some other interesting links are:
>
> https://github.com/relan/exfat
>
> and:
>
> https://en.wikipedia.org/wiki/ExFAT#Adoption
>
> which states that one of the drivers is by Samsung, then GPL-ed,
> but claims that all drivers might conflict with Microsoft patents.
>
> I remember that for VFAT and FAT32, it turned out that supporting
> the filesystem itself by universal-purpose free operating systems
> like Linux or FreeDOS is no problem, as Microsoft explicitly gave
> permission for that category of use years ago. How about ExFAT?
>
> The wikipedia piece also lists tricks to use exFAT on DOS already.
> And that, interestingly, ExFAT lacks short file names and "."/"..".
>
ExFAT is indeed covered by Microsoft patents, the Samsung driver is said 
to be in violation of those and should be avoided at all cost if you 
don't want to risk patent litigation with M$ at some point...

http://techrights.org/2013/07/25/joosun-hahn-gpl-violations-and-samsungs-microsoft-patent-trap-in-linux-exfat/

Ralf

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