Hitachi Global Storage Technologies hasits own enterprise drive for high-performance environments. The UltraStar 15K147 runs at 15,000 RPM and comes with 16 MB cache like the Fujitsu drives , but it has different platter configurations. The 36.7 GB model uses two rather than one platter, and the 73.4 GB drive has three rather than two. Although this indicates a lower data density, the design, in fact, avoids the use of the inner, slower area of the magnetic platters. As a result, the distance that the heads have to cover may be smaller, which can result in better average access time.

Product Identifiers
Brand    Hitachi
Model    HUS153014VLS300


Key Features
Enclosure    Internal
Hard Drive Type    HDD (Hard Disk Drive)
Capacity    147 GB
Buffer Size    16 MB
Spindle Speed    15000 RPM
Interface    SAS, SCSI
Designation    Desktop Computer

Performance

• Drive Transfer Rate   300 MBps
• Internal Data Rate    180 MBps
• Seek Time               3.4 ms (average)
• Average Latency      2 ms
• Spindle Speed          15000 rpm

Note: Refurb Hard Drive.