Product Description Momentus 7200.4 laptop hard drives deliver industry leading 7200-RPM performance with environmentally responsible low power consumption. The drives are available with G-Force Protection technology for added robustness and durability. The technology senses when the drive is in free-fall and quickly protects against shock damage by moving the heads off the disk. With capacities from 160GB to 500GB, 16 MB cache and 3 Gb/s SATA with NCQ, the Momentus 7200.4 hard drive is perfect for performance and mainstream laptops, workstations and smallform-factor desktop systems.Seagate Technology, a leader in storage, is dedicated to building products that meet the needs of the consumer and integrator, allowing them to build solutions that are state of the art, maximizing useful system life. Seagate also works hand in hand with major technology players to develop new platforms and interfaces for system builders. Unlike many competitors, Seagate takes a leadership role, as well as learning from our customers, to develop the future of storage and what it means to computing. From the Manufacturer The Seagate® Momentus® 2.5-inch drive is the world's most feature-rich 2.5-inch drive for laptops and external enclosures. Momentus drives deliver solutions and customer confidence with options in speed and capacity, and innovative features such as Self-Encrypting Drives and drop sensor technology. Choose from six capacities: 750, 640, 500, 320, 250 and 160GB; two performance speeds: 7200 RPM and 5400 RPM; and three innovative features: Self-Encrypting Drives, FIPS 140-2 certification (in process) and free-fall drop sensor. Momentus drives give you the power to transform from ordinary to extraordinary. Seagate® Momentus® Momentus Laptop Hard Drives What the experts are saying... The world's most feature-rich 2.5-inch drive for laptop upgrades and external enclosures. The Momentus drive family offers innovative options, capacities to 750GB, two performance speeds and significant feature options. The Seagate Momentus drives are perfect for any standard laptop and meet your specific upgrade needs whether they are: More Capacity Higher Performance Lower Power Consumption More Security Greater Reliability Why choose the Seagate Momentus? 7200-RPM and 5400-RPM speeds and 8MB and 16MB cache size to increase application performance 750, 640, 500, 320, 250 and 160GB models for 5400-RPM drives 750, 500, 320, 250 and 160GB models for 7200-RPM drives Seagate SmartAlign™ technology provides a transition to 4K sectors without the need for software utilities *Optional FIPS 140-2 Validated™ Seagate Self-Encrypting Drive technology delivers government-grade encryption without performance degradation - protecting your data where it lives. Optional 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. *Not available in all models or countries. Requires TCG-compliant host or controller support. TM: The FIPS logo is a certification mark of NIST, which does not imply product endorsement by NIST, the U.S., or Canadian governments. 'The overall read and write speeds were the best of the comparison drives for all of the testing, reaching over 100MB a second at one point. The fact that this is a 2.5' hard drive this makes it a great contender...' - Overclockers Club, August 2009 'Forget the charts, forget the benches we had a real life winner here. The 7200 RPM platter speed consuming only .05v more voltage than a 5200 RPM drive had won us over quickly.' - Bjorn3D, April 2009 'The Seagate Momentus ST9500420AS is one hell of a performer and the 500 GB capacity makes it an excellent choice for notebooks to be used as desktop replacements.' - TechTree, May 2009 'Seagate Momentus 7200.4 Mobile Hard Drive (ST9500420AS) Buzzilions Reviewers Choice Finalist 2010. Ranked #14' - Buzzilions, 2010 'Seagate dominates the performance segment with the Momentus 7200.4.' - Tom's Hardware, June 2009 The world's most feature-rich 2.5-inch drive for laptop upgrades and external enclosures now available up to 750GB! Seagate® Momentus® Family Hard Drives Seagate® Momentus® 5400 & 7200 RPM drives with capacities up to 750GB Seagate® Momentus® XT Solid State Hybrid drives with Adaptive Memory Technology click here Momentus Specifications Momentus 5400 Drives Momentus 7200 Drives Feature Options 640GB1 500GB1 320GB1 250GB1 160GB1 750GB1 500GB1 320GB1 250GB1 160GB1 Standard Models ST9640320AS ST9500325AS ST9320325AS ST9250315AS ST9160314AS ST9750420AS ST9500420AS ST9320423AS ST9250410AS ST9160412AS Free-Fall Sensor Models ST9500325ASG2 ST9500420ASG2 ST9250410ASG2 FDE Models ST9500327AS ST9250317AS ST9500421AS ST9250411AS FDE FIPS 140-2 Models ST9500422AS ST9250412AS Interface SATA 3Gb/s NCQ SATA 3Gb/s NCQ SATA 3Gb/s NCQ SATA 3Gb/s NCQ SATA 3Gb/s NCQ SATA 3Gb/s NCQ SATA 3Gb/s NCQ SATA 3Gb/s NCQ SATA 3Gb/s NCQ SATA 3Gb/s NCQ Cache (MB) 8 8 8 8 8 16 16 16 16 16 Configuration Bytes per Sector 512 512 512 512 512 40963 512 512 512 512 Reliability/Data Integrity Head-Rest Method Quiet Step™ Ramp Load Quiet Step Ramp Load Quiet Step Ramp Load Quiet Step Ramp Load Quiet Step Ramp Load Quiet Step Ramp Load Quiet Step Ramp Load Quiet Step Ramp Load Quiet Step Ramp Load Quiet Step Ramp Load Load/Unload Cycles >600,000 >600,000 >600,000 >600,000 >600,000 >600,000 >600,000 >600,000 >600,000 >600,000 Nonrecoverable Read Errors per Bits Read 1 per 10E14 1 per 10E14 1 per 10E14 1 per 10E14 1 per 10E14 1 per 10E14 1 per 10E14 1 per 10E14 1 per 10E14 1 per 10E14 Annualized Failure Rate (AFR) 0.48% 0.48% 0.48% 0.48% 0.48% 0.50% 0.50% 0.50% 0.50% 0.50% Power Management Power (W) Seek, Typical Idle, Typical 1.30.68 1.540.81 1.540.81 1.540.81 1.540.81 1.50.7 1.5540.67 1.5540.67 1.5540.67 1.5540.67 Environmental Temperature (°C) Operating Nonoperating 0 to 60-40 to 70 0 to 60-40 to 70 0 to 60-40 to 70 0 to 60-40 to 70 0 to 60-40 to 70 0 to 60-40 to 70 0 to 60-40 to 70 0 to 60-40 to 70 0 to 60-40 to 70 0 to 60-40 to 70 Shock (Gs) Operating: 2ms Nonoperating: 1ms 3501000 3501000 3501000 3501000 3501000 3501000 3501000 3501000 3501000 3501000 Acoustics (bels—sound power) Idle, Typical Seek, Typical 2.32.6 2.42.6 2.42.6 2.42.6 2.42.6 2.32.5 2.32.5 2.32.5 2.32.5 2.32.5 Physical Height (in/mm) 0.374/9.5 0.374/9.5 0.374/9.5 0.374/9.5 0.374/9.5 0.370/9.5 0.370/9.5 0.370/9.5 0.370/9.5 0.370/9.5 Width (in/mm) 2.75/69.85 2.75/69.85 2.75/69.85 2.75/69.85 2.75/69.85 2.75/69.85 2.75/69.85 2.75/69.85 2.75/69.85 2.75/69.85 Depth (in/mm) 3.957/100.5 3.957/100.5 3.957/100.5 3.957/100.5 3.957/100.5 3.951/100.35 3.951/100.35 3.951/100.35 3.951/100.35 3.951/100.35 Weight (lb/g) 0.218/98.8 0.218/98.8 0.218/98.8 0.218/98.8 0.218/98.8 0.254/115 0.238/110 0.238/110 0.227/105 0.227/105 1 One gigabyte, or GB, equals one billion bytes and one terabyte, or TB, equals one trillion bytes when referring to drive capacity. 2 Drive with G-Force Protection™ feature 3 Advanced Sector Format (4K) drive with SmartAlign™ technology resolves misalignment conditions.