Drivers for some supported hardware devices are not included as part of the base ESXi image. These devices require a driver be installed before the hardware can be used in vSphere.
Third-party drivers are packaged as vSphere Installation Bundles (VIBs). A VIB file is similar to a ZIP archive in that it is a single file that includes an archive of the driver files, an XML descriptor file, and a signature file. VIB files have the
.vib file extension.
The required drives can be installed after ESXi has been installed, using the
esxcli software vib install -v <path to vib package>
A custom ESXi image can also be created using the Image Builder tools included with PowerCLI. PowerCLI can be downloaded ...