Backplane

Use the section to understand the cable routing for backplanes.

This topic contains the following information:

• Server models with eight 2.5-inch drives

• Server models with sixteen 2.5-inch drives

• Server models with twenty 2.5-inch drives

• Server models with twenty-four 2.5-inch drives

• Server models with eight 3.5-inch drives

• Server models with twelve 3.5-inch drives

Before you route cables for backplanes, observe the adapter priority and the PCIe slot selection priority when installing the NVMe switch adapter or a RAID adapter.

• Adapter priority: NVMe switch adapter, 24i RAID adapter, 8i HBA/RAID adapter, 16i HBA/RAID adapter

• PCIe slot selection priority when installing the NVMe switch adapter:

  Number of installed processors	PCIe slot selection priority
  One processor	1
  Two processors	1, 5, 6

  • For server models with sixteen/twenty/twenty-four NVMe drives (with two processors installed):

    Server models	PCIe slot selection
    Sixteen NVMe drives	1, 4, 6, 7
    Twenty NVMe drives	1, 4, 5, 6, 7
    Twenty-four NVMe drives	1, 2, 4, 6, 7

• PCIe slot selection priority when installing a 24i RAID adapter:

  Number of installed processors	PCIe slot selection priority
  One processor	1, 2, 3
  Two processors	1, 2, 3, 5, 6

• PCIe slot selection priority when installing a 8i or 16i HBA/RAID adapter:

  Number of installed processors	PCIe slot selection priority
  One processor	7, 4, 2, 3, 1
  Two processors	7, 4, 2, 3, 1, 5, 6

Note

• The PCIe slot 7 refers to the RAID adapter slot on the system board.

• If the rear hot-swap drive assembly is installed, PCIe slots 1, 2, and 3 will become unavailable because the space is occupied by the rear hot-swap drive assembly.

• The adapter priority of the 530-16i or 930-16i RAID adapter adapter can be higher than the 930-8i RAID adapter when both 16i RAID adapter and 8i RAID adapter are chosen.

• Oversubscription may exist in some configurations installed with NVMe 810-4P/1610-8P/1611-8P switch adapters. For details, see Controllers for internal storage.

• Server models with eight 2.5-inch drives
  Use this section to understand the cable routing for server models with eight 2.5-inch drives.
• Server models with sixteen 2.5-inch drives
  Use this section to understand the cable routing for server models with sixteen 2.5-inch drives.
• Server models with twenty 2.5-inch drives
  Use this section to understand the cable routing for server models with twenty 2.5-inch drives.
• Server models with twenty-four 2.5-inch drives
  Use this section to understand the cable routing for server models with twenty-four 2.5-inch drives.
• Server models with eight 3.5-inch drives
  Use this section to understand the cable routing for server models with eight 3.5-inch SAS/SATA drives.
• Server models with twelve 3.5-inch drives
  Use this section to understand the cable routing for server models with twelve 3.5-inch drives.