Lenovo ThinkServer RD640 User Manual And Hardware Maintenance Manual page 53

Figure 25. Front view of the backplane for 3.5-inch hard disk drives
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Figure 26. Rear view of the backplane for 3.5-inch hard disk drives
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1 2 8-pin power connector
3 Optical drive power connector
4 Mini-SAS ports 4-7
5 Mini-SAS ports 0-3
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