SAS-216EL Backplane User's Guide SAS #J23 ACT #24 FAIL #24 2-6 Front LED Indicators Front LED Hard Drive Activity Failure LED SAS #J0 ACT #1 FAIL #1 SAS #J1 ACT #2 FAIL #2 SAS #J2 ACT #3 FAIL #3 SAS #J3 ACT #4 FAIL #4 SAS #J4 ACT #5 FAIL #5 SAS #J5 ACT #6 FAIL #6 SAS #J6 ACT #7 FAIL #7 SAS #J7 ACT #8 FAIL #8 SAS #J8 ACT #9 FAIL #9 SAS #J9 ACT #10 FAIL #10 SAS #J10 ACT #11 FAIL #11 SAS #J11 ACT #12 FAIL #12 SAS #J12 ACT #13 FAIL #13 SAS #J13 ACT #14 FAIL #14 SAS #J14 ACT #15 FAIL #15 SAS #J15 ACT #16 FAIL #16 SAS #J16 ACT #17 FAIL #17 SAS #J17 ACT #18 FAIL #18 SAS #J18 ACT #19 FAIL #19 SAS #J19 ACT #20 FAIL #20 SAS #J20 ACT #21 FAIL #21 SAS #J21 ACT #22 FAIL #22 SAS #J22 ACT #23 FAIL #23