For many years, there were significant support and compatibility issues with SCSI that
did not occur with IDE/ATA. Since IDE was the "native" hard disk interface for
most PCs, and was by far the most common interface used, all software worked with it. SCSI
on the other hand was much less common in PCs, especially in their earlier years, and so
there were occasional support issues. Extra drivers or special software would be needed to
get older operating systems like "straight DOS" and Windows 3.x to function with
SCSI at all.
Today, this is pretty much a non-issue. Modern operating systems all provide support
for SCSI host adapters and devices. You may need to install a driver or some utility
software, but if you stick with well-known brand names even this may not be necessary.
Next: System Resource Usage