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Momentus® 5400 Laptop Hard Drives

Satisfy your capacity cravings with up to 640GB of pure digital space

Model ST9640320AS SATA 3Gb/s 640GB

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Best-Fit Applications

  • Mainstream laptops
  • External storage solutions/boxes
  • Industrial applications requiring a smaller form factor

Key Features and Benefits

  • Up to 640GB holds thousands of songs, photos, video and more
  • 5400-RPM for great performance and the lowest power consumption
  • 8-MB cache delivers fast performance
  • 1000 Gs of nonoperating shock make the drive ideal for notebook PCs and industrial applications
  • Utilizes ramp load features that remove the head from the disk during idle periods, improving idle power consumption and adding to the durability of the drive

Key Advantages

  • Leverages Seagate laptop power management technology, delivering the lowest-power 5400-RPM laptop hard drive yet
  • QuietStep™ technology enables ultra-quiet load/unload acoustics
  • Energy-efficient power for maximum performance
  • 8-MB cache enhances performance
  • SATA 3Gb/s with Native Command Queuing enables fast data transfers
  • Perpendicular recording technology delivers the capacity points you need

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Momentus 5400 SATA 3Gb/s 640-GB Hard Drive

ST9640320AS

Specifications
Model Number ST9640320AS
Interface SATA 3Gb/s
Cache 8MB
Capacity 640GB
Areal density (avg) 394Gb/in2
Guaranteed Sectors 1,250,263,728
PHYSICAL
Height 9.5mm (0.374 in)
Width 69.85mm (2.75 in)
Length 100.35mm (3.951 in)
Weight (typical) 100g (.220 lb)
PERFORMANCE
Spindle Speed 5400 RPM
Average latency 5.5ms
Random read seek time 11.0ms
I/O data transfer rate 300MB/s
Unrecoverable read errors 1 in 1014
RELIABILITY
Annual Failure Rate 0.48
POWER
5V start max current 1.0A
Average idle power 0.68W
Average operating power 1.25W
Average seek power 1.3W
ENVIRONMENT
Ambient Temperature
Operating 0°–60°C
Nonoperating -40°–70°C
Maximum operating temperature change 20°C per hour
Maximum nonoperating temperature change 35°C per hour
Shock
Operating Shock (max) 350 Gs for 2ms
Nonoperating Shock (max) 800 Gs for 2ms
ACOUSTICS
Acoustics (Idle Volume) 2.4 bels
Acoustics (Seek Volume) 2.6 bels

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