Seagate ST3750630AS, ST31000340AS, ST31000640AS, ST3750330AS

Table 1:	Drive specifications summary for 1000 and 750 Gbyte models

Drive specification		ST31000340AS	ST31000640AS	ST3750330AS	ST3750630AS

Formatted capacity (512 bytes/sector)*		1000 Gbytes		750 Gbytes

Guaranteed sectors		1,953,525,168		1,465,149,168

Heads		8		6

Discs		4		3

Bytes per sector		512

Default sectors per track		63

Default read/write heads		16

Default cylinders		16,383

Recording density		1090 kbits/in max

Track density		150 ktracks/in avg

Areal density		164 Gbits/in2 avg
Spindle speed		7,200 RPM

Internal data transfer rate		1287 Mbits/sec max

Sustained data transfer rate OD		105 Mbytes/sec max

I/O data-transfer rate		300 Mbytes/sec max

ATA data-transfer modes supported		PIO modes 0–4
		Multiword DMA modes 0–2
		Ultra DMA modes 0–6

Cache buffer		32 Mbytes	16 Mbytes	32 Mbytes	16 Mbytes

Height (max)		26.1 mm (1.028 inches)

Width (max)		101.6 mm (4.000 inches) +/- 0.010 inches

Length (max)		146.99 mm (5.787 inches)

Weight (typical)		677 grams ( 1.493 lb.)		633 grams ( 1.396 lb.)

Average latency		4.16 msec

Power-on to ready		20 sec max

Standby to ready		15 sec max

Track-to-track seek time		<1.0 msec typical read;
		<1.2 msec typical write

Average seek, read		<8.5 msec typical

Average seek, write		<9.5 msec typical

Startup current (typical) 12V (peak)		3.0 amps

Voltage tolerance (including noise)		5V +10% / -7.5%
		12V +10% / -7.5%

Ambient temperature		0° to 60°C per hour max (operating)
		–40° to 70°C per hour max (nonoperating)

Temperature gradient		20°C per hour max (operating)
		30°C per hour max (nonoperating)

Relative humidity		5% to 95% (operating)
		5% to 95% (nonoperating)

Relative humidity gradient		30% per hour max

Wet bulb temperature		37.7°C max (operating)
		40.0°C max (nonoperating)

Altitude, operating		–60.96 m to 3,048 m
		(–200 ft. to 10,000+ ft.)

Altitude, nonoperating		–60.96 m to 12,192 m
(below mean sea level, max)		(–200 ft. to 40,000+ ft.)

Operational Shock		70 Gs max at 2 msec

Non-Operational Shock		300 Gs max at 2 msec

4	Barracuda 7200.11 Serial ATA Product Manual, Rev. C

ST3500820AS, ST3500320AS, ST3500620AS, ST31000640AS, ST31000340AS specifications

Seagate has long been a prominent player in the hard drive industry, and its line of SATA drives, including the ST3640330AS, ST3750330AS, ST3750630AS, ST31000340AS, and ST31000640AS, showcases a blend of performance, reliability, and advanced technology. These drives cater to various user needs, from consumer desktops to enterprise applications.

The ST3640330AS and ST3750330AS models are designed with a 7200 RPM spinning speed, ensuring fast data throughput for gaming, multimedia, and everyday computing tasks. With a SATA interface and compatibility with the latest systems, these drives are ideal for users seeking efficient storage solutions. The ST3640330AS provides 640 GB of storage, while the ST3750330AS boasts a generous 750 GB capacity, offering ample space for large files and applications.

Moving to the ST3750630AS, this model continues the trend of high performance, offering 750 GB of storage but enhanced with Seagate’s advanced error-correcting technology. It also features an updated cache architecture that optimizes read and write speeds while minimizing latency. This drive is particularly beneficial for users who require reliable backups and quick access to data.

The ST31000340AS and ST31000640AS are both part of Seagate’s 1 TB series and are engineered for durability and longevity. The ST31000340AS features traditional SATA technology, providing users with a balance between cost and performance. On the other hand, the ST31000640AS integrates improved power management features that result in lower energy consumption without compromising performance. This makes it a suitable choice for environmentally-conscious consumers or businesses looking to reduce operational costs.

All models feature Seagate's proprietary technologies such as SoftSonic drives, which result in quieter operation, and advanced power management capabilities that extend the lifespan of the hard drives. They are equipped with robust error recovery and data security features, ensuring data integrity and protecting against data loss.

Overall, the Seagate ST3640330AS, ST3750330AS, ST3750630AS, ST31000340AS, and ST31000640AS drives represent a comprehensive range of storage solutions that combine capacity, speed, and cost-effectiveness, making them a popular choice for a variety of users, from casual consumers to demanding enterprise environments.

Drive specifications summary for 1000 and 750 Gbyte models

Barracuda 7200.11 Serial ATA Product Manual, Rev. C

ST3500820AS, ST3500320AS, ST3500620AS, ST31000640AS, ST31000340AS specifications