2.9.1.1Typical current profile

Figure 1. Typical +5V only startup and operation current profile

2.9.2Deferred spinup

Momentus 5400 FDE.3 SATA drives do not support the deferred spinup option. If you require this option, refer to the Momentus 5400.3 SATA Blade Server family of drives.

2.9.3Conducted noise

Input noise ripple is measured at the host system power supply across an equivalent 15-ohm resistive load on the +5 volt line.

Using 5-volt power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave injected noise at up to 10 MHz.

Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.

2.9.4Voltage tolerance

Voltage tolerance (including noise):

5V ± 5%

Momentus 5400 FDE.3 SATA Product Manual, Rev. A

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Seagate ST9120312AS, ST9320322AS, ST9160312AS Typical current profile, Deferred spinup, Conducted noise, Voltage tolerance

ST9120312AS, ST9160312AS, ST9320322AS specifications

The Seagate ST9320322AS, ST9160312AS, and ST9120312AS are hard disk drives (HDDs) designed for reliable storage solutions in various computing environments. These drives belong to the Barracuda line, known for their high performance and robust features.

The ST9320322AS is a 320GB, 2.5-inch SATA hard drive that operates at a speed of 7200 RPM. It has a 16MB cache buffer, enhancing data access speeds and allowing for efficient multi-tasking. This drive is particularly suitable for laptops, external drives, and other applications requiring high-capacity storage paired with portability. Its low power consumption makes it an ideal choice for mobile systems, contributing to longer battery life.

On the other hand, the ST9160312AS is a 160GB version, also a 2.5-inch SATA HDD running at 7200 RPM. Like the ST9320322AS, it features a 16MB cache, which optimizes performance for everyday computing tasks. This model is often utilized in gaming consoles and entry-level laptops, offering a balance of performance and affordability. With a height of only 9.5mm, it is designed to fit in ultrathin laptops while providing ample storage space for user data, applications, and multimedia files.

The ST9120312AS further reduces storage capacity to 120GB, while maintaining the same rotational speed of 7200 RPM. This HDD is designed for users looking for reliable, cost-effective storage solutions without compromising on performance. Like its counterparts, it features a 16MB cache and operates efficiently, making it suitable for applications that require moderate data storage, such as basic computing tasks and media storage.

All three models leverage Seagate’s advanced recording technology, which enhances data integrity and reliability. They also incorporate sophisticated error recovery tools that help prevent data loss, ensuring longevity and durability under various operating conditions. These drives support the SATA interface, which provides high-speed data transfer rates, making them compatible with a wide range of computing devices.

In conclusion, the Seagate ST9320322AS, ST9160312AS, and ST9120312AS hard drives represent a strong selection for users in need of reliable, efficient, and compact storage solutions. With their combination of high performance, energy efficiency, and advanced technologies, they continue to serve a vital role in modern computing architectures.