/DISABLE=HBMM DSAn:
       /DISABLE=HBMM /ALL
       /DISABLE=SPLIT_READ_LBNS

    Disables host-based minimerge (HBMM) on the specified shadow set
    or clusterwide on all shadow sets.

    /DISABLE=SPLIT_READ_LBNS disables the split behavior of logical
    block numbers and as a result the reads are alternated between
    the source shadow set members having the same read_cost and
    device queue length.