Avago Technologies 3ware 9650SE-12ML - Manual (Page 29)

Step 4. Connecting Drive Activity LED Indicators (Optional)
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Figure 20. 24-Port 3ware 9650SE-24M8 Serial ATA RAID Controller
Additional Details About the LED Status
Connectors
As shown in Figure 16 through Figure 19, LED connectors for
individual drives are on J7 for the 2-port and 4-port cards, on J7 and
J8 for the 8-port, on J7, J8, and J9 for the 12-port cards, on J7, J8,
J9, and J1 for the 16 port card, and on J9, J10, J11, J12, J13, and J14
for the 24-port card.
Pin 1 is located in the lower left-hand corner of each 10-pin
connector. The odd-numbered pins, located on the bottom row, are
3.3V for the anode (+) side of each LED to be connected. The even-
numbered pins are on the top or cathode (-) side. Table 2
summarizes the LED indicator pin positions for the different
controllers.
Overall LED drive status indicator is the
right-most LED header pin pair on each
LED connector (J9, J10, J11, J12, J13,
J14). The anode is the lower of the two
pins and the cathode is the upper.
LED indicators for individual drives
J9 is for drives 0, 1, 2, 3 (left to right)
J10 is for drives 4, 5, 6, 7 (left to right)
J11 is for drives 8, 9, 10, 11 (left to right)
J12 is for drives 12, 13, 14, 15 (left to right)
J13 is for drives 16, 17, 18, 19 (left to right)
J14 is for drives 20, 21, 22, 23 (left to right)