Sleep mode

Table 1:	Drive specifications

Drive specification		ST9250827AS	ST9200827AS	ST9160827AS	ST9120817AS

Full-stroke seek (msec)		20 (typical); 24 (max)

Startup current, +5V (typical)		1.0 amps

Seek power (typical)		2.0 watts

Read/write power (typical)		Read: 2.0 watts; Write: 1.6 watts

Idle mode, low power (typical)		0.6 watts

Standby mode		0.20 watts (typical)***

Sleep mode		0.20 watts (typical)***

Voltage tolerance (including noise)		+5V ± 5%

Ambient operating temperature		0° to 60°C (operating), –40° to 70°C (nonoperating)

Temperature gradient (°C per hour max)		20°C (operating)
		35°C (nonoperating)

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

Relative humidity gradient		30% per hour max

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

Altitude, operating		–304.8 m to 3,048 m (–1,000 ft to 10,000+ ft)

Altitude, nonoperating		–304.8 m to 12,192 m (–1000 ft to 40,000+ ft)
(meters below mean sea level, max)

Shock, operating (Gs max at 2 msec)		325

Shock, nonoperating (Gs max at 2 msec)		800

Shock, nonoperating (Gs max at 1 msec)		900

Shock, nonoperating (Gs max at 0.5 msec)		600

Vibration, operating		1.5 G (0 to peak, 5–500 Hz)

Vibration, nonoperating		5 Gs (0 to peak, 5–500 Hz)

Drive acoustics, sound power (bels)
Idle**		2.4 (typical)
		2.6 (max)

Performance seek		2.6 (typical)
		2.8 (max)

Nonrecoverable read errors		1 per 1014 bits read
Annualized Failure Rate (AFR)		0.7%

Load/Unload (U/UL) cycles
25°C, 50% relative humidity		600,000 software-controlled power on/off cycles
		20,000 hard power on/off cycles
32°C, 80% relative humidity		600,000 software-controlled power on/off cycles
5°C, 80% relative humidity		20,000 hard power on/off cycles
5°C, 10% relative humidity
55°C, 16% relative humidity

Warranty		5 years on distribution units.
		To determine the warranty for a specific drive, use a web browser to access the following
		web page:
		www.seagate.com/support/service/
		From this page, click on the “Verify Your Warranty” link. You will be asked to provide the
		drive serial number, model number (or part number) and country of purchase. The system
		will display the warranty information for your drive.

Supports Hotplug operation per Serial ATA		Yes (requires COMPRESET from host after a hotplug event)
Revision 2.5 specification

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

4	Momentus 5400.4 SATA Product Manual, Rev. A

ST9120817AS, ST9160827AS, ST9200827AS, ST9250827AS specifications

The Seagate ST9250827AS, ST9200827AS, ST9160827AS, and ST9120817AS are notable hard drives that have made their mark in the storage industry, primarily due to their reliable performance, capacity options, and advanced technologies. Each model is tailored to meet the needs of different user scenarios, making them versatile choices for both personal and enterprise applications.

The ST9250827AS, with a capacity of 250GB, is designed for users requiring sufficient storage for general applications. Ideal for laptops and external drives, it offers a 5400 RPM spindle speed, ensuring quick access times and efficient data retrieval. The drive also incorporates Seagate’s Advanced Power Management technology, which helps extend battery life in portable devices by optimizing power consumption.

The ST9200827AS steps up with a 320GB capacity, catering to users needing increased storage for larger files, applications, and media collections. With similar 5400 RPM performance, it balances speed and energy efficiency. This model is suitable for those looking to enhance their mobile experience without sacrificing performance.

The ST9160827AS, a 160GB variant, is a compact solution for users needing a smaller footprint. It retains the energy efficiency and power management features present in the other models while delivering adequate performance for everyday computing tasks. This model is particularly suited for older machines or as a secondary drive in systems where space is at a premium.

Lastly, the ST9120817AS, with its 120GB capacity, is the smallest of the lot, perfect for basic storage needs. It’s well-suited for entry-level laptops or as a backup option for essential data. While its capacity may be limited compared to the others, it maintains the same reliability and efficiency attributed to Seagate’s technology.

All four models utilize Seagate's Drive Trust Technology, ensuring data integrity and security. They are built using Seagate's hard drive technologies that emphasize durability and reliability. These drives are also equipped with a SATA interface, facilitating fast data transfer rates and seamless integration with a wide range of computing devices.

In summary, the Seagate ST9250827AS, ST9200827AS, ST9160827AS, and ST9120817AS hard drives provide varying capacities and consistent performance, catering to diverse user requirements. Their blend of energy-efficient operation, advanced technology, and dependable storage solutions make them suitable for both personal and professional use, ensuring reliable data management across all applications.

Seagate ST9250827AS, ST9200827AS, ST9160827AS, ST9120817AS manual Sleep mode

Models: ST9120817AS ST9160827AS ST9200827AS ST9250827AS

Momentus 5400.4 SATA Product Manual, Rev. A

ST9120817AS, ST9160827AS, ST9200827AS, ST9250827AS specifications