MR_LdBlockSizeGet
MR_LdBlockSizeGet(u_int32_t ldTgtId, MR_DRV_RAID_MAP_ALL * map);
ld_block_size = MR_LdBlockSizeGet(device_id, map_ptr);
u_int32_t MR_LdBlockSizeGet(u_int32_t ldTgtId, MR_DRV_RAID_MAP_ALL * map);