Cable routing for 2.5-inch drives
Follow the instructions in this section to learn how to do cable routing for 2.5-inch drives.
Go through the following list to acquire necessary information before starting cable routing for 2.5-inch drives.
Preliminary parts removal and installation
- Make sure the following components are removed beforehand:
- Top cover (see Remove the top cover)
- Processor and memory expansion tray (see Remove the processor and memory expansion tray)
- Fan cage (see Remove the fan cage assembly)
Make sure to install all the drive backplanes that you plan to installed (see Install a drive backplane).
Power cables
Connect power cables to drive backplanes as illustrated.
Figure 1. Drive backplane power cables
![](sr850v2_058-450.png)
![](sr850v2_058-450.png)
1 Drive backplane 1 to connector 1 | 3 Drive backplane 3 to connector 3 |
2 Drive backplane 2 to connector 2 |
Cable guides
Make sure all the signal cables go through the cable guides on the system board and the memory expansion tray.
Figure 2. Cable guides on the system board
![](sr850v2_071-500.png)
![](sr850v2_071-500.png)
Figure 3. Cable guides on the processor and memory expansion tray
![](sr850v2_072-600.png)
![](sr850v2_072-600.png)
SAS/SATA cables for Gen3 and Gen4 RAID adapters
When picking cables for 8i and 16i RAID adapters from SAS/SATA cable kits, make sure to choose the cables based on the generation of RAID adapters that you plan to install:
- Gen3 RAID adapters (430-8i, 930-8i, 430-16i, 530-16i, 930-16i): MiniSAS to Slimline cable
- Gen4 RAID adapters (940-8i, 940-16i): Slimline cable
Backplane and PCIe slot reference
See the label on the cable for reference of PCIe slots to installed RAID adapters or PCIe switch cards in. For example, “BP 1/4” and “Slot 1/8 means the cable could be applied to the following scenarios:
- Connecting backplane 1 to RAID adapter that is installed in slot 1
- Connecting backplane 4 to RAID adapter that is installed in slot 8
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