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August 28, 2019 04:05 pm

Microsoft Readies exFAT Patents For Linux and Open Source

An anonymous reader writes: For years, Microsoft used its patents as a way to profit from open-source products. The poster-child for Microsoft's intellectual property aggression were the File Allocation Table (FAT) patents. But the Microsoft of then is not the Microsoft of now. First, Microsoft open-sourced its entire patent portfolio and now Microsoft is explicitly making its last remaining FAT intellectual property, the exFAT patents, available to Linux and open source via the Open Invention Network (OIN). Microsoft announced that it now loves Linux and "we say that a lot, and we mean it! Today we're pleased to announce that Microsoft is supporting the addition of Microsoft's exFAT (Extended File Allocation Table) technology to the Linux kernel." ExFAT is based on FAT, one of the first floppy disk file systems. Over time, FAT became Microsoft's files ystem of choice for MS-DOS and Windows. It would become the default file system for many applications. Microsoft extended FAT to flash memory storage devices such as USB drives and SD cards in 2006 with exFAT. While FAT isn't commonly used today, exFAT is used in hundreds of millions of storage device. Indeed, exFAT is the official file system for SD Card Association's standard large capacity SD cards. Now, Microsoft states: "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 the development of conformant, interoperable implementations. We also support the eventual inclusion of a Linux kernel with exFAT support in a future revision of the Open Invention Network's Linux System Definition, where, once accepted, the code will benefit from the defensive patent commitments of OIN's 3040+ members and licensees." Specifically, according to a Microsoft representative, "Microsoft is supporting the addition of the exFAT file system to the Linux kernel and the eventual inclusion of a Linux kernel with exFAT support in a future revision of the Open Invention Network's Linux System Definition."

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