MR_LD_TARGET_SYNC
MR_LD_TARGET_SYNC *target_map = NULL;
MR_LD_TARGET_SYNC *ld_sync;
target_map = (MR_LD_TARGET_SYNC *) sc->raidmap_mem[(sc->map_id - 1) & 1];
ld_sync = (MR_LD_TARGET_SYNC *) target_map;