•  2.5-inch SATA/SAS 8-bay backplane (referred to as “8-bay backplane”)
•  2.5-inch AnyBay 8-bay backplane (referred to as “AnyBay backplane”)
4U PCIe riser assemblies can be installed when the PCIe slot 3 or 13 are not occupied by PCIe adapters, 
make sure the slots for 4U PCIe riser cards are available before the riser card installation.
Cable routing for 2.5-inch drives to one backplane
Use this section to route cables for 2.5-inch drives to one backplane.
Following is the list of combinations of cable routing for 2.5-inch drives to one backplane.
• 
“Connecting signal cables to one backplane” on page 33
–  “One 8-bay backplane” on page 34
–  “One AnyBay backplane” on page 35
–  Two processors installed
–  Four processors installed
Connecting signal cables to one backplane
When there is one backplane installed, see the following illustrations for cable routing. 
Chapter 2. Server components 33