Rear backplane: 4 x 3.5-inch SAS/SATA
This topic provides cable routing information for the 12 x 3.5-inch Anybay server model with a rear 4 x 3.5- 
inch SAS/SATA drive cage.
•  “16i RAID/HBA adapter + onboard connectors” on page 181
•  “16i RAID/HBA adapter + 8i RAID/HBA adapter + onboard connectors” on page 182
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ThinkSystem SR650 V2Maintenance Manual