HGST Ultrastar 15K300 147GB 3Gb/s SAS 20PK 0B22131-20PK Leaflet

Product codes
0B22131-20PK
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Built upon proven technology
Hitachi’s next-generation 3.5-inch 15,000 RPM hard drive delivers the performance and 
reliability required for mission-critical enterprise computing environments. Leveraging the 
proven system architecture and electronics of the previous generation, the Ultrastar™ 15K300 
provides up to 300 GB capacity, 16 MB cache and Ultra320 SCSI, 3 Gb/s Serial Attached 
SCSI (SAS) and 4 Gb/s Fibre Channel interfaces. These features make the Ultrastar 15K300 
the ideal solution for demanding enterprise computing environments like online transaction 
processing, intensive data analysis and other multi-user applications. The mature design of 
the Ultrastar 15K300 helps to ensure shorter qualification times.
 
Demonstrated reliability
Key reliablility features have been built into the Ultrastar 15K300. Rotational Vibration Safe-
guard (RVS) technology ensures drive performance in multi-drive systems where rotational 
vibration is likely to occur. Hitachi’s Thermal Fly-height Control (TFC) capability maintains 
a consistent fly-height during the read/write process ensuring a better soft error rate and 
end-to-end data protection enhances error detection for optimal data integrity. Finally, Hitachi 
offers the only enterprise-class hard drive utilizing a head load/unload ramp to help minimize 
drive failures as a result of handling during integration. 
www.hitachiGST.com
300, 147 and 73 GB | 15,000 RPM  
Ultra320 SCSI, 3 Gb/s SAS  
and 4 Gb/s FCAL
Highlights
Capacities up to 300 GB 
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Large 16MB cache size minimizes  
command overhead
SAS, Fibre Channel or SCSI interfaces for 
configuration flexibility 
Mature design ensures greater reliability 
and faster qualification time
Applications/Environments
Online transaction processing
RAID
Storage Area Network (SAN)
Network Attached Storage (NAS)
Scientific engineering and data analysis
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Hitachi Ultrastar
 15K300
Highest performance and reliability for mission-critical computing environments
Feature / Function
Benefits
Performance 
15,000 RPM 
Reduced latency for faster access to data
 
16 MB cache buffer 
Optimizes  read/write response times
 
Rotational Vibration Safeguard (RVS) 
Maintains drive performance in high rotational  
 
 
vibration environments and multi-drive systems
 
Workload detector technology 
Maximizes performance in RAID environments
Reliability 
End-to-end data protection (ANSI) 
Enhanced error detection for optimal data integrity
 
TMR head technology 
Highly reliable design for  high-density storage
 
Thermal Fly-height Control (TFC)  
Better soft error rate for improved reliability 
 
& Adaptive formatting 
& performance
 
Head load/unload ramp 
Minimizes handling damage during integration
 
Fluid Dynamic Bearing (FDB) motor 
Improved acoustics & proven reliability
Capacity 
300 GB, 147 GB & 73 GB capacities 
Configuration flexibility
Interfaces
Ultra320 SCSI 
Ease of integration & configuration flexibility 
 
3 Gb/s Serial-Attached SCSI 
 
4 Gb/s Fibre Channel
Features and Benefits
3.5-INCH ENTERPRISE HARD DISK DRIVES