TARGET_NUM_PEERS_PDEV
if (sc->num_peers > (TARGET_NUM_PEERS_PDEV(sc) - 1)) {
#define TARGET_NUM_PEERS_SINGLE(sc) (TARGET_NUM_PEERS_PDEV(sc))
#define TARGET_NUM_PEERS_DBS(sc) (2 * TARGET_NUM_PEERS_PDEV(sc))
#define TARGET_NUM_PEERS_DBS_SBS(sc) (3 * TARGET_NUM_PEERS_PDEV(sc))