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  • David Sterba's avatar
    btrfs: add support for 3-copy replication (raid1c3) · 47e6f742
    David Sterba authored
    Add new block group profile to store 3 copies in a simliar way that
    current RAID1 does. The profile attributes and constraints are defined
    in the raid table and used by the same code that already handles the
    2-copy RAID1.
    The minimum number of devices is 3, the maximum number of devices/chunks
    that can be lost/damaged is 2. Like RAID6 but with 33% space
    Signed-off-by: default avatarDavid Sterba <>