MPI2_HEADER_VERSION_UNIT  279 drivers/scsi/megaraid/megaraid_sas_fusion.h #define MPI2_HEADER_VERSION_UNIT            (0x10)
MPI2_HEADER_VERSION_UNIT  165 drivers/scsi/mpt3sas/mpi/mpi2.h #define MPI2_HEADER_VERSION_UNIT            (0x36)