The 'Linux folks' have been working on this for quite awhile, if it weren't for licensing incompatibilities with ZFS, they'd likely already have it.
If you'll pardon my saying so, that's because it's not 'the Linux folks' that have been working on it - it's other non-'Linux folk' companies (cough RIP, Sun cough) that took it upon themselves to make a better filesystem for their (coincidentally, and nothing to do with Linux) open source operating systems. The closest the 'Linux folks' got was ReiserFS under Hans Reieser, who's work was largely rejected by the mainstream 'Linux folks' working on the kernel... until the months just before his arrest and conviction for the murder of his wife.
ZFS has as much to do with Linux as NTFS has to do with Linux - developed wholly outside of the Linux community by people not in the Linux community nor associated with the Linux community, with implementations available for Linux that are not redistributable with the kernel for patent- or licensing-related reasons.
But, yes, BtrFS (developed by Oracle) is indeed a 'Linux folk' attempt at creating a modern filesystem. And BtrFS does indeed predate ReFS.
The GRUB update in May 2011 added support for booting both ZFS and btrfs. If your having issue all you need to do is update grub to get proper support.
If you'll pardon my saying so, that's because it's not 'the Linux folks' that have been working on it - it's other non-'Linux folk' companies (cough RIP, Sun cough) that took it upon themselves to make a better filesystem for their (coincidentally, and nothing to do with Linux) open source operating systems. The closest the 'Linux folks' got was ReiserFS under Hans Reieser, who's work was largely rejected by the mainstream 'Linux folks' working on the kernel... until the months just before his arrest and conviction for the murder of his wife.
ZFS has as much to do with Linux as NTFS has to do with Linux - developed wholly outside of the Linux community by people not in the Linux community nor associated with the Linux community, with implementations available for Linux that are not redistributable with the kernel for patent- or licensing-related reasons.
But, yes, BtrFS (developed by Oracle) is indeed a 'Linux folk' attempt at creating a modern filesystem. And BtrFS does indeed predate ReFS.