Overview of the ENZ0 PCIe Gen4 I/O expansion drawer

The ENZ0 PCIe Gen4 I/O expansion drawer (ENZ0 PCIe4 expansion drawer) is a 482.6 mm (19 in), 4U PCIe Gen4 I/O drawer. Each ENZ0 PCIe4 expansion drawer provides up to 12 PCIe Gen4 adapter slots.

The ENZ0 PCIe4 expansion drawer is connected to a system by one or more expansion drawer cable pairs. Each pair provides a single x16 PCIe Gen4 link between the system and the ENZ0 PCIe4 expansion drawer. The number of extra PCIe slots that are provided and the number of expansion drawer cable pairs that are needed depends on the I/O module configuration of the ENZ0 PCIe4 expansion drawer.

Ensure that a cable adapter is installed in the host system before you install the ENZ0 PCIe4 expansion drawer.

For all systems except the 9043-MRX or 9080-HEX, you must power off the system to install the cable adapter.

To install a cable adapter to accommodate an ENZ0 PCIe4 expansion drawer, see the following procedures:
  • If your system is managed by an HMC, see Installing a part by using the HMC.
  • If your system is not managed by an HMC, see the adapter install instructions for your system.
  • For information about adapter placement, see the adapter placement rules and slot priorities topic for your system or expansion drawer.
Note: To remove or relocate an ENZ0 PCIe4 expansion drawer, the system power must be turned off for all configurations.