Summary: The Cool Blog reports on the use of the Windows btrfs driver for sharing files between Windows and Linux dualboot systems. The driver fully supports both operating systems and offers features such as transparent compression and copy on write on Windows. The creator of the driver, maharmstone, has also been working on an open source reimplementation of the Windows bootloader called Quibble, which allows one to boot Windows off of other filesystems. The author successfully used Quibble to boot Windows off of a btrfs partition, but encountered issues with the ntfs2btrfs program when attempting to write to the partition. The author ultimately created a new btrfs partition and copied over the files, and even had the idea to boot both Windows and Linux from the same partition without file conflicts. However, the article notes that "Windows 10 apps" from the Microsoft Store do not work when using Quibble.