12 x 3.5-inch SAS/SATA front drive bays
This section provides cable routing information for the server model with 12 x 3.5-inch SAS/SATA front drive 
bays.
Refer to the specific topic for signal cable connections depending on the backplanes you have installed.
•  “Front backplane: 12 x 3.5-inch SAS/SATA” on page 165
•  “Rear backplanes: 2 x 3.5-inch/4 x 3.5-inch/4 x 2.5-inch SAS/SATA” on page 167
•  “Middle backplanes: 8 x 2.5-inch NVMe” on page 176
•  “Middle and rear backplanes: 4 x 3.5-inch SAS/SATA + 4 x 3.5-inch/4 x 2.5-inch SAS/SATA” on page 173
164
ThinkSystem SR650 V2Maintenance Manual