Tom's Hardware: "SSDs are best for performance. SATA hard drives provide maximum capacity. Enterprise-class SAS disks are the workhorses positioned between them. But which enterprise hard drive capacity makes sense when there are several from which to choose?
Different capacity points are based on different internal hardware configurations, and, as a result, the products within one hard drive family will typically deliver different performance and efficiency compared to another family. We wanted to know how the three popular capacities in the 2.5” enterprise hard drive space differ, and we used three of the latest Toshiba drives—300, 450, and 600 gigabyte capacities, each with different head and platter configurations—to find answers."