Btrfs RAID Support For RAID 5/6 Is Improving
Written by Michael Larabel in Linux Storage on 17 November 2014 at 10:12 AM EST. 2 Comments
Of the RAID 0/1/5/6/1+0 levels supported natively by the Btrfs file-system, it's been the RAID 5 and RAID 6 implementations that have been deemed experimental and not yet production ready. Fortunately, that may soon be changing with some fresh Btrfs tool patches.

Miao Xie posted a set of nine Btrfs patches on Friday that provide device scrub/replace support for RAID 5/6. The scrub/replace support has been one of the missing features from deeming these RAID levels ready for production use. This implementation is similar to the other RAID types.

More details on the Btrfs scrub/replace support for RAID 5/6 can be found via these linux-btrfs patch series.

For those that missed it in recent weeks I've been doing a lot of Linux RAID testing including: Btrfs On 4 x Intel SSDs In RAID 0/1/5/6/10, Btrfs RAID: Built-In/Native RAID vs. Mdadm, and Btrfs/EXT4/XFS/F2FS RAID 0/1/5/6/10 Linux Benchmarks On Four SSDs. Overall the Btrfs RAID support is working out very well with modern Linux kernel releases.
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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 20,000 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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