SATA 7200 rpm drives are our standard high bandwidth hard drive storage options; most workstation models are also available with high performance 10K rpm rotation speeds. Storage capabilities range up to a massive 2.0 TB.
The 7200 rpm HDDs (Hard Disk Drives) are all 3.5" drives. The 10K rpm drives are SFF (Small Form Factor, 2.5") drives (available bare and in 3.5" frames); the appropriate choice depends on drive bay availability in a chassis.
HP Z-Series Workstations: