Adaptec makes it clear on the box and in the product literature that the AAA-UDMA is meant for entry-level servers. This should come as no surprise to those familiar with RAID systems. SCSI controllers can have 15 or more devices per channel (depending on exactly which type of SCSI is used), and since arrays can span multiple channels and even multiple cards in high-end configurations, SCSI RAID arrays consisting of tens of drives are not uncommon in large servers. And since even a single-channel SCSI controller can hold many more than four drives, this ATA solution is strictly intended for small servers for those on a budget. The box says such a server should support no more than 25 users, so this is the kind of device a company might consider for use in a workgroup server. Despite Adaptec’s recommendation, it seems from the specifications that this card would also be great for high-end desktop or workstation systems that need a lot of hard disk throughput and redundancy, but can’t afford a significantly more expensive SCSI array.