How to structure a driver for a IDE controller with hardware RAID support?

[Shaheed]

Hi,

I have a device called an IT8212 IDE RAID controller. It comes with a Linux 
2.4 driver which emulates a SCSI interface and supports both JBOD and 
hardware RAID (0 and 1) modes of operation.

I don't quite understand the relationship between drivers/ide/... and RAID 
support. Why for example, would the existing driver be written as a SCSI 
driver and not an IDE driver?

Thanks, Shaheed
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