Serial Attached SCSI (SAS) is a logical evolution of SCSI, incorporating its long-known advantages of software and a serial interface for physical connectivity. With the increasing demands on enterprise data storage systems and their complexity, factors such as high capacity, high density, security, scalability, and availability are becoming more important than ever. Enterprise data centers must operate continuously online, simultaneously handling requests from numerous users, ensuring constant growth and expansion, while also being maintained in operational condition. Serial Attached SCSI (SAS) meets all these requirements while delivering the highest performance. The HPE P28586-B21 Mission Critical hard drive has a 2.5-inch form factor and an external data transfer rate of 12 Gbps. It features a spindle speed of up to 10,000 RPM and a capacity of 1.2 TB. This small form factor hard drive utilizes the SAS-12Gbps (Serial Attached SCSI) interface and comes with a 3-year warranty.