Enthusiasts have showcased the capability to boot Windows 10 from a partition with the Btrfs file system. Btrfs support was enabled through the open-source WinBtrfs driver, which proved adequate to fully replace NTFS. The open-source bootloader Quibble was utilized for direct booting of Windows from the Btrfs partition.
In practice, using Btrfs for Windows is relevant for saving disk space in dual-boot systems, as the content of Linux and Windows environments does not overlap at the base directory name level, allowing both environments to reside in a single shared filesystem without the need for separate partitions. The Windows system environment was migrated to Btrfs from the original NTFS partition using the Ntfs2btrfs utility, after which Arch Linux was additionally installed on the Btrfs partition using the pacstrap utility.
Source: opennet.ru
