If Windows 7 installer wants you to load the SCSCI device driver
in order to see the HD to install, then you'll need to find the driver for that device on the computer/device's SUpport Downloads webpage for your model, unzip it on stick or CD, then browse to it using the "Load Drivers
" link on the "Where do you want to Install Windows 7" screen until the driver is picked up and installed and suddenly the HD appears on the screen.
If there is no Windows 7 driver, try Vista driver, or as a last resort XP driver.
Is the device showing in BIOS?
Did you run the Windows 7 Upgrade Advisor to see if the device is able to run in Windows 7? Windows 7 Upgrade Advisor