Highest Available Notebook Performance
The Seagate Momentus 7200.4 drive delivers the highest available laptop hard drive capacity while satisfying today’s need for desktop performance in a notebook computer. System builders can count on extending the life of their 7200-RPM laptops by eliminating the need to replace or upgrade due to performance obsolescence issues. All this without sacrificing battery life, because these new 7200-RPM drives draw only slightly more power than a 5400-RPM laptop drive.

When it comes to getting more time back in your day, nothing feels better than a well-performing laptop. Our Momentus 7200-RPM drives can give precious moments back when you really need them. In fact, Seagate 7200-RPM drives can shut your system down 34 percent faster, and opening big files can be up to 30 seconds faster than a 5400-RPM drive can manage. When it’s your turn to shine, your 7200-RPM Seagate drive won’t keep you waiting.

G-Force Protection
Additionally, the Momentus 7200-RPM family comes with an optional G-Force Protection feature for hardcore road warriors or even aspiring warriors in need of extra robustness. The G-Force Protection feature provides enhanced data protection against shock that may occur while the drive is operating. This feature is designed to decrease the likelihood of data loss by detecting a freefall event and unloading the actuator before a shock takes place in falls of greater than 8 inches (nominal). The drive uses a drop sensor mounted on the printed circuit board assembly to sense this event and protect your data.

• Highest available notebook performance
• 500-GB capacity
• G-Force Protection™ feature
• Native Command Queuing
• Green features:
  • Lowest-power 7200-RPM laptop hard drive yet
  • Ramp load features improve idle power consumption
• State-of-the-art error correction
• Fluid dynamic bearing motor
• Support for S.M.A.R.T. drive monitoring and reporting
• Support for Read Multiple and Write Multiple commands

Model Number	ST9500420AS
Capacity	500GB
Interface	SATA 3 Gb/s NCQ
Cache	16MB
Form Factor	2.5-inch
Areal density (avg)	394 Gbits/inch2
Guaranteed Sectors	976,773,168
Performance
Spindle Speed	7200 rpm
Average latency	4.17 msec
Random read seek time	11.0 msec
Random write seek time	13.0 msec
Reliability/Data Integrity
Recording Method	16/17 EPRML
Head-Rest Method	QuietStep™ Ramp Load
Load / unload cycles	600,000
Nonrecoverable Read Errors per Bits Read	1 per 10E14
Power Management
Power (W)
Seek, Typical	1.554 Watts
Idle, Typical	0.67 Watts
Environmental
Temperature (°C)
Operating	0° C to 60 ° C
Non-operating	-40° C to 70 ° C
Shock (Gs)
Operating: 2ms	350G
Non-operating: 1ms	1000G
Acoustics (bels–sound power)
Idle, Typical	2.3
Seek, Typical	2.5
Physical
Height	9.5 mm (0.370 inches)
Width	69.85 mm (2.750 inches)
Length	100.35 mm (3.951 inches)
Weight	110 grams (0.238 pounds)

3 Year Limited Warranty