Dell hardware overview
This section provides a comprehensive overview of the system layout and configuration details of the Dell hardware in the IBM Fusion HCI.
The following table lists all the nodes and switches used in the IBM Fusion HCI along with their respective rack unit
locations:
| Server / Switch | Description | Rack position |
|---|---|---|
| Compute-only server / Compute-storage server (Model 9155-D10 and 9155-D14) | See Compute-only and compute-storage server model servers | RU2 to RU17 |
| Service node (Model 9155-DB1) | See Service node | RU23 |
| Network switches | See Network switches and configuration |
|
Hardware configuration
You have two options for obtaining a rack: either you can buy a rack
directly from the IBM, or you can arrange for a rack yourself. For more information about rack
options, see IBM Fusion HCI rack ordering options.
- Rack configuration
- The rack configuration includes the physical arrangement of servers, storage systems, and
network devices.
Rack configuration Description Rack size 42U Networking - 2x Ethernet high-speed switches
- 2x Ethernet management switches
Compute only or compute-storage servers - 6x servers with 2-10 NVMe drives per server
- KVM connected to the service node (optional)
- Servers in RU2, RU3, and RU4 become the OpenShift® control plane servers
- You can choose any one of the following server configuration options:
- 6x 32 core servers
- 6x 64 core servers
- 3x 32 core servers + 3x 64 core servers
Storage 2x 7.68 TB NVMe PCIe drives or 3.84 TB NVMe drives (no mixing within a rack)
- Scalable options
- To customize your rack configuration, the following options are available:
Table 1. Rack configuration Description Additional compute-storage servers Add up to 10 additional compute-storage servers, for a maximum total of 16 servers Additional storage Add more storage to compute-storage servers using: - 7.68 TB NVMe PCIe drives (up to 10 drives per server)
- 3.84 TB NVMe PCIe drives (up to 10 drives per server)Important: No mixing of 7.68 TB and 3.84 TB drives is allowed within a rack.
Additional compute power Add compute-only servers to increase compute power
Power Distribution Unit (PDU)
Power Distribution Units (PDUs) play a crucial role in the IBM Fusion HCI, providing reliable and efficient power distribution to the IBM Fusion HCI components. This section outlines the standard PDU positions in the system.
Important: The PDU positions shown are an example and not all racks have this same
configuration.
Important: The PDUs that are installed in a rack does vary according the to number
and type of servers in the rack.
All the PDUs that are installed in the rack are needed and
all of them must be connected to power.Note: For independent or redundant power feeds, the two power sources must be split between the
left and lower (odd numbered) PDUs and the right and upper (even numbered) PDUs.
For more information about the line cords for power connections, see Supported PDU power cords. For more information about power prerequisites for IBM Fusion, see General power information.There are two
possible models of the PDU and the one you get depends on your power connection:
- For all single-phase power and for wye-wired three-phase power, there is one PDU feature code. See Supported PDU power cords are ECJN with Souriau inlet table in Supported PDU power cords
- For delta-wired three-phase power (typically used only in N America), there is a different PDU feature code. See Supported PDU power cords for PDU feature codes ECJQ with Amphenol inlet table in Supported PDU power cords.
To know more about power distribution in IBM Fusion HCI MTM (Gen 1), see Hardware overview of a single IBM Fusion HCI.
Drives and usable storage capacities
To determine the usable storage capacities for drives, utilize the IBM Storage Modeler (StorM) tool. This tool provides an accurate calculation of the available storage space, taking into account various factors that affect storage capacity.
Weight of miscellaneous rack parts
The following table lists the weight of the rack configs that include miscellaneous parts beyond
individual components like cables, Constellation rack and so on:
| Component | Weight (lbs) | Weight (kg) | Model |
| SN3700 200GbE switch | 30.8 | 14.0 | S05 |
| SN2201 1GbE switch | 16.3 | 7.4 | S04 |
| SN3700C switch | 27.5 | 12.5 | S01 |
| 7316-TF5 console | 12.0 | 5.5 | TF5 |
| R660XL 32-core 256GB server, 0 drives | 47.8 | 21.7 | D10 |
| R660XL 32-core 256GB server, 2 drives | 52.2 | 23.7 | D10 |
| R660XL 32-core 256GB server, 10 drives | 69.8 | 31.7 | D10 |
| R660XL 64-core 1024GB server, 0 drives | 47.8 | 21.7 | D14 |
| R660XL 64-core 1024GB server, 2 drives | 52.2 | 23.7 | D14 |
| R660XL 64-core 1024GB server, 10 drives | 69.8 | 31.7 | D14 |
| R660 8-core service node | 44.8 | 44.8 | DB1 |
| Constellation rack | 398.2 | 181.0 | R42 |
| Intelligent switched PDU+ | 9.5 | 4.3 | NA |
| All cables, rails, and so on. | 395.5 | 179.8 | NA |