ST9640423AS Seagate Momentus 640GB 5400RPM SATA 3GB/s 16MB Cache 2.5-inch Hard Drive

 Hard Disk Model

SEAGATE ST9640423AS

Disk Family

Momentus 5400 640423

Form Factor

2.5"

Capacity

640 GB (640 x 1 000 000 000 bytes)

Number Of Disks

2

Number Of Heads

4

Rotational Speed

5400 RPM

Rotation Time

11.11 ms

Average Rotational Latency

5.56 ms

Disk Interface

Serial-ATA/300

Buffer-Host Max. Rate

300 MB/seconds

Buffer Size

16384 KB

Drive Ready Time (typical)

3.6 seconds

Average Seek Time

11 ms

Track To Track Seek Time

1.5 ms

Full Stroke Seek Time

27 ms

Width

69.85 mm (2.75 inch)

Depth

100.35 mm (3.95 inch)

Height

9.5 mm (0.37 inch)

Weight

115 grams (0.25 pounds)

Acoustic (Idle)

2.3 Bel

Acoustic (Min performance and volume)

2.5 Bel

Acoustic (Max performance and volume)

3.0 Bel

Required Power For Spinup

1200 mA

Power Required (Seek)

2.4 W

Power Required (Idle)

1.2 W

Power Required (Standby)

0.36 W

Manufacturer

Seagate Technology