- Although I know a lot about early 1990s Amiga SCSI, I know next to nothing about SCSI RAID.
If a device is called "RAID controller" it usually means that a RAID is an option, not a requirement.
The line that has me confused in the product description is: "...for systems that already have embedded SCSI or an installed add-in host adapter for low speed devices".
This probably means that it is not bootable, i.e. you have to boot from another controller and this one is only accessible once Windows drivers have been loaded.
I would just try it out. Put it in and see what Windows says about it. If drivers are needed, try to find some and install them. Then connect a harddrive and check what Windows disk management tells about it. If disk management sees the hdd, WinUAE should, too.