MR_FW_RAID_MAP_ALL
struct MR_FW_RAID_MAP_ALL *fw_map_old = NULL;
fw_map_old = (struct MR_FW_RAID_MAP_ALL *)
static_assert(offsetof(struct MR_FW_RAID_MAP_ALL, raidMap.ldSpanMap) ==
offsetof(struct MR_FW_RAID_MAP_ALL, ldSpanMap));