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Seagate HDD SATA/300 500GB 16MB 7200.4 2.5" Print
February 2011
The Momentus family of 2.5-inch laptop drives offers innovative options and features, such as capacity up to 750GB, two different performance speeds, and three significant features.
Key Features and Benefits
  • Seagate SmartAlign™ technology provides a transition to 4K sectors without the need for software utilities.
  • Seagate Self-Encrypting Drives deliver government-grade encryption without performance degradation—protecting your data where it lives. The FIPS 140-2* options are NIST government-certified for both U.S. and Canadian usage with sensitive data.**
  • Seagate G-Force Protection™ technology can detect when your laptop is in a free-fall, swing the drive heads to a safe zone and keep the data safe.
  • 7200-RPM and 5400-RPM speeds for customized performance, and 8MB and 16MB cache size to enhance your application performance
  • 750, 640, 500, 320, 250 and 160GB models for 5400-RPM drives for high-capacity to entry-level and mainstream systems
  • 750, 500, 320, 250 and 160GB models for 7200-RPM drives for high-capacity and high-performance systems
Model Number ST9500420AS
Interface SATA 3Gb/s
Cache 16MB
Capacity 500GB
Areal density (avg) 394Gb/in2
Guaranteed Sectors 976,773,168
Height 9.5mm (0.370 in)
Width 69.85mm (2.750 in)
Length 100.35mm (3.951 in)
Weight (typical) 110g (0.238 lb)
Spin Speed (RPM) 7200 RPM
Average latency 4.17ms
Random read seek time 11.0ms
Random write seek time 13.0ms
Annual Failure Rate 0.5%
5V start max current 1.0A
Storage Type HDD

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