Server model with 16 x 2.5-inch front drive bays (8 SAS/SATA + 8 NVMe)
This section provides cable routing information for the server model with one 8 x 2.5-inch SAS/SATA front backplane and one 8 x 2.5-inch NVMe front backplane. The NVMe backplane provides eight NVMe drive bays (bays 0–7).
Configuration 1: two front backplanes (8 NVMe + 8 SAS/SATA), onboard connections
| Cable | From | To |
|---|---|---|
| 1 NVMe signal cable | NVMe 0-1 connector on the NVMe backplane | PCIe connector 1 on the system board |
| NVMe 2-3 connector on the NVMe backplane | PCIe connector 2 on the system board | |
| 2 NVMe signal cable | NVMe 4-5 connector on the NVMe backplane | PCIe connector 3 on the system board |
| NVMe 6-7 connector on the NVMe backplane | PCIe connector 4 on the system board | |
| 3 SAS signal cable | SAS 0 and SAS 1 connectors on the SAS/SATA backplane | PCIe connector 6 on the system board |
Configuration 2: two front backplanes (8 NVMe + 8 SAS/SATA), one 8i RAID/HBA adapter
When a Gen 4 RAID/HBA adapter is installed, ensure that you use the corresponding Gen 4 cable:
ThinkSystem SR655 2.5" SAS/SATA 8-Bay X40 RAID Cable Kit
| Cable | From | To |
|---|---|---|
| 1 NVMe signal cable | NVMe 0-1 connector on the NVMe backplane | PCIe connector 1 on the system board |
| NVMe 2-3 connector on the NVMe backplane | PCIe connector 2 on the system board | |
| 2 NVMe signal cable | NVMe 4-5 connector on the NVMe backplane | PCIe connector 3 on the system board |
| NVMe 6-7 connector on the NVMe backplane | PCIe connector 4 on the system board | |
| 3 SAS signal cable | SAS 0 connector on the SAS/SATA backplane | The RAID/HBA adapter
|
| SAS 1 connector on the SAS/SATA backplane | The RAID/HBA adapter
|
Configuration 3: two front backplanes (8 NVMe + 8 SAS/SATA), one rear drive cage (SAS/SATA), one 16i RAID/HBA adapter
This configuration supports one rear 2.5-inch drive cage with a 4 x 2.5-inch SAS/SATA drive backplane.
When a Gen 4 RAID/HBA adapter is installed, ensure that you use the corresponding Gen 4 cable:
For cable 3: ThinkSystem SR655 2.5" SAS/SATA 8-Bay X40 RAID Cable Kit
For cable 4: ThinkSystem SR655 2.5" & 3.5" SAS/SATA 4-Bay Rear Backplane X40 RAID Cable Kit
| Cable | From | To |
|---|---|---|
| 1 NVMe signal cable | NVMe 0-1 connector on the NVMe backplane | PCIe connector 1 on the system board |
| NVMe 2-3 connector on the NVMe backplane | PCIe connector 2 on the system board | |
| 2 NVMe signal cable | NVMe 4-5 connector on the NVMe backplane | PCIe connector 3 on the system board |
| NVMe 6-7 connector on the NVMe backplane | PCIe connector 4 on the system board | |
| 3 SAS signal cable | SAS 0 connector on the SAS/SATA backplane | The RAID/HBA adapter
|
| SAS 1 connector on the SAS/SATA backplane | The RAID/HBA adapter
| |
| 4 SAS signal cable | SAS connector on the rear backplane | The RAID/HBA adapter
|
Configuration 4: two front backplanes (8 NVMe + 8 SAS/SATA), one rear drive cage (SAS/SATA), two 8i RAID/HBA adapters
This configuration supports one rear 2.5-inch drive cage with a 4 x 2.5-inch SAS/SATA drive backplane.
When a Gen 4 RAID/HBA adapter is installed, ensure that you use the corresponding Gen 4 cable:
For cable 3: ThinkSystem SR655 2.5" SAS/SATA 8-Bay X40 RAID Cable Kit
For cable 4: ThinkSystem SR655 2.5" & 3.5" SAS/SATA 4-Bay Rear Backplane X40 RAID Cable Kit
| Cable | From | To |
|---|---|---|
| 1 NVMe signal cable | NVMe 0-1 connector on the NVMe backplane | PCIe connector 1 on the system board |
| NVMe 2-3 connector on the NVMe backplane | PCIe connector 2 on the system board | |
| 2 NVMe signal cable | NVMe 4-5 connector on the NVMe backplane | PCIe connector 3 on the system board |
| NVMe 6-7 connector on the NVMe backplane | PCIe connector 4 on the system board | |
| 3 SAS signal cable | SAS 0 connector on the SAS/SATA backplane | The RAID/HBA adapter on the internal riser card
|
| SAS 1 connector on the SAS/SATA backplane | The RAID/HBA adapter on the internal riser card
| |
| 4 SAS signal cable | SAS connector on the rear backplane | The RAID/HBA adapter on riser card 1
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