Normally, one would find Promise drivers on the Promise website: http://www.promise.com/support/downl...&productID=108
However, Promise provides appaulingly poor support for Linux. None of their drivers work with current Linux kernels. They ignore most requests for updates. But feel free to send your comments to: firstname.lastname@example.org
I recommend disabling the FastTrak raid functionality and using Linux soft-raid instead. It is far superior to FastTrak soft-raid.
When choosing a raid device, always confirm that it has *active* kernel support before buying anything. Actually, when choosing ANY hardware intended to be used with Linux, always check for kernel-compatibility first.