when logged on the T3, you can see the state of each FRU with the command
fru stat
Example :
hostname-t3:/:fru stat CTLR STATUS STATE ROLE PARTNER TEMP ------ ------- ---------- ---------- ------- ---- u1ctr ready enabled master - 32.5 DISK STATUS STATE ROLE PORT1 PORT2 TEMP VOLUME ------ ------- ---------- ---------- --------- --------- ---- ------ u1d1 ready enabled data disk ready ready 34 v0 u1d2 ready enabled data disk ready ready 30 v0 u1d3 ready enabled data disk ready ready 43 v0 u1d4 ready enabled data disk ready ready 31 v0 u1d5 ready enabled data disk ready ready 39 v0 u1d6 ready enabled data disk ready ready 31 v0 u1d7 ready enabled data disk ready ready 32 v0 u1d8 ready enabled data disk ready ready 30 v0 u1d9 ready enabled standby ready ready 31 v0 LOOP STATUS STATE MODE CABLE1 CABLE2 TEMP ------ ------- ---------- ------- --------- --------- ---- u1l1 ready enabled master - - 27.5 u1l2 ready enabled slave - - 30.0 POWER STATUS STATE SOURCE OUTPUT BATTERY TEMP FAN1 FAN2 ------ ------- --------- ------ ------ ------- ------ ------ ------ u1pcu1 ready enabled line normal normal normal normal normal u1pcu2 ready enabled line normal normal normal normal normal