Lenovo ThinkSystem SR850 Maintenance Manual page 44

Connecting signal cables to two backplanes
When there are two backplanes installed, see the following illustrations for cable routing.
8-bay backplane + 8-bay backplane
Two options are available for this combination:
Attention: When installing a 8-bay backplane and a AnyBay backplane, always install the 8-bay backplane to
drive bay 0-7, and the AnyBay backplane to drive bay 8-15.
1. With SATA/SAS RAID adapter (16i)
Figure 31. Cable routing, 8-bay backplane + 8-bay backplane
Table 28. Cables and adapters for routing
1
SATA/SAS RAID adapter (16i)
2
SATA/SAS signal cables (900 mm)
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ThinkSystem SR850 Maintenance Manual
3
SATA/SAS signal cables (720 mm)