2.2Formatted capacity

 

Formatted

Guaranteed

 

Model

capacity*

sectors

Bytes per sector

 

 

 

 

ST3750640SCE

750 Gbytes

1,465,149,168

512

 

 

 

 

ST3750840SCE

750 Gbytes

1,465,149,168

512

 

 

 

 

ST3500830SCE

500 Gbytes

976,773,168

512

 

 

 

 

ST3400820SCE

400 Gbytes

781,422,768

512

 

 

 

 

ST3320820SCE

320 Gbytes

625,142,448

512

 

 

 

 

ST3300820SCE

300 Gbytes

586,072,368

512

 

 

 

 

ST3250820SCE

250 Gbytes

488,397,168

512

 

 

 

 

*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting.

2.2.1LBA mode

When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1,where n is the number of guaranteed sectors as defined above.

See Section 4.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48- bit addressing support of drives with capacities over 137 Gbytes.

2.3Default logical geometry

Cylinders

Read/write heads

Sectors per track

 

 

 

16,383

16

63

 

 

 

LBA mode

When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1,where n is the number of guaranteed sectors as defined above.

12

DB35.3 Series Serial ATA Product Manual, Rev. D

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Seagate ST3400820SCE, ST3250820SCE, ST3300820SCE, ST3750640SCE manual Formatted capacity, Default logical geometry, LBA mode

ST3400820SCE, ST3300820SCE, ST3750840SCE, ST3250820SCE, ST3750640SCE specifications

Seagate’s series of hard drives, including the ST3320820SCE, ST3500830SCE, ST3750640SCE, ST3250820SCE, and ST3750840SCE, comprise a robust lineup designed for both consumer and professional use.

The ST3320820SCE model features a storage capacity of 320GB and operates at a rotational speed of 7200 RPM, allowing for faster data access and improved overall performance. This drive is equipped with SATA interface, providing higher data transfer rates and enhanced connectivity options. Its 8MB cache enhances read and write speeds, thus making it suitable for multitasking environments.

In comparison, the ST3500830SCE offers a larger capacity with 500GB storage. This drive is also based on the same 7200 RPM speed standard, ensuring optimal performance for both gaming applications and data-heavy tasks. The SATA interface remains a central feature, promoting seamless integration into a range of PC configurations.

The ST3750640SCE takes the storage capabilities further, offering a generous 750GB space. It shares similar technological advancements such as the SATA interface and 7200 RPM speed, making it ideal for users needing extensive storage for multimedia files, software applications, and backups. The reliable performance alongside its increased capacity makes it a favored choice among professionals.

The ST3250820SCE model is targeted towards those needing a balance between performance and cost-efficiency. With a 250GB capacity, this drive provides ample space for everyday usage while maintaining a robust 7200 RPM speed and 8MB cache. This makes it an ideal option for entry-level systems and general-purpose computing.

Lastly, the ST3750840SCE offers up to 750GB of space, similar to the ST3750640SCE, but also incorporates advanced technologies for enhanced reliability and durability. This includes features like Seagate's Smart Align technology, which optimizes the drive's performance by efficiently managing data, especially with modern 4K sector drives.

Overall, these Seagate models cater to a wide spectrum of users, from casual home users to professionals requiring reliable and high-performance storage solutions. With a combination of speed, capacity, and innovative technologies, they stand out as solid choices in the hard drive market.