ExFAT, the Extended File Allocation Table, is Microsoft’s file system for flash drives and SD cards, which launched in 2006. Because it was proprietary, mounting these drives and cards on Linux machines generally involved installing additional software. Today, however, Microsoft announced that it is supporting the addition of exFAT to the Linux kernel and publishing the technical specifications for exFAT.

“It’s important to us that the Linux community can make use of exFAT included in the Linux kernel with confidence. To this end, we will be making Microsoft’s technical specification for exFAT publicly available
to facilitate development of conformant, interoperable implementations.”

In addition to wanting it to become part of the Linux kernel, Microsoft also says that it hopes that the exFAT specs will become part of the Open Invention Network’s  Linux definition. Once accepted, the code would benefit “from the defensive patent commitments of OIN’s 3040+ members and licensees,” the company notes.

Microsoft and Linux used to be mortal enemies — and some in the Linux community definitely still think of Microsoft as anti-open source. These days, though, Microsoft has clearly embraced open source and Linux, which is now the most popular operating system on Azure and, optionally, part of Windows 10, thanks to its Windows Subsystem for Linux. It’ll still be interesting to see how the community will react to this proposal. The aftertaste of Microsoft’s strategy of  “embrace, extend and extinguish” still lingers in the community, after all, and not too long ago, this move would’ve been interpreted as yet another example of this.