SCA818S Backplane User’s Guide B. Rear Connectors and LED Indicators B-1 Rear Connector/LED Indicator Locations Rear View D5 D6 SCA1 SCA#0 SCA#2 SCA4 SCA2 D12 D13 D14 D16 SCA#1 (*See below for rear connector/LED descriptions.) B-2 Connector/LED Indicator Descriptions B-2.1 Backplane Rear Connectors B-2.2 Backplane Rear LED Indicators A-8 Rear Connector Specification SCA1 (Rear) SCSI HDD#0 (SCA#0) SCA4 (Rear) SCSI HDD#1 (SCA#1) SCA2 (Rear) SCSI HDD#2 (SCA#2) Rear LED Indicator Specification D12 (Rear) SCA#0 Activity LED D13 (Rear) SCA#1 Activity LED D14 (Rear) SCA#2 Activity LED D5 (Rear) SCA#0 Fail LED D6 (Rear) SCA#1 Fail LED D16 (Rear) SCA#2 Fail LED