RAID 5/6 Support Finally Comes To Btrfs
Written by Michael Larabel in Free Software on 4 February 2013 at 05:44 PM EST. 15 Comments
It's been a long time coming, but the Btrfs file-system now finally supports RAID 5 and RAID 6 configurations for the next-generation Linux file-system.

RAID 5 is block-level striping with distributed parity while RAID 6 is block-level striping with double distributed parity. RAID 5/6 support has been talked about for Btrfs for a long-time while this weekend the experimental patches were finally pushed by Chris Mason.

Still to be worked out is a few bugs plus support for scrub repairing bad blocks, discard support, progs support for parity rebuild, and planned support for n-way mirroring.

Many more details on the implementation and other information regarding Btrfs RAID 5/6 can be found from the mailing list announcement. While currently an experimental feature, the support will likely end up in a mainline Linux kernel release in one or two cycles ahead.

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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter or contacted via

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