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    md/raid1: Allocate spare to store replacement devices and their bios. · 8f19ccb2
    NeilBrown 提交于
    In RAID1, a replacement is much like a normal device, so we just
    double the size of the relevant arrays and look at all possible
    devices for reads and writes.
    
    This means that the array looks like it is now double the size in some
    way - we need to be careful about that.
    In particular, we checking if the array is still degraded while
    creating a recovery request we need to only consider the first 'half'
    - i.e. the real (non-replacement) devices.
    Signed-off-by: NNeilBrown <neilb@suse.de>
    8f19ccb2
raid1.c 74.1 KB