3Ware 9750 not detected by installer

Problem:

The 3ware 9750 controller is not detected by the operating system installer. Booting from a rescue disc and running lspci shows that the card is not present.

Affected Platforms:

Solution:

The following BIOS option:

ADVANCED->PCI/PNP CONFIGURATION->SBX1 SETTING

Should be set to: 2 x8

The default setting of auto results in the card being unavailable to the operating system.