2.8Power specifications

The drive receives DC power (+5V or +12V) through a native SATA power connector. See Figure 4 on page 24.

2.8.1Power consumption

Power requirements for the drives are listed in the table on page 9. Typical power measurements are based on an average of drives tested, under nominal conditions, using 5.0V and 12.0V input voltage at 25°C ambient temperature.

• Spinup power

Spinup power is measured from the time of power-on to the time that the drive spindle reaches operating speed.

• Seek mode

During seek mode, the read/write actuator arm moves toward a specific position on the disc surface and does not execute a read or write operation. Servo electronics are active. Seek mode power represents the worst-case power consumption, using only random seeks with read or write latency time. This mode is not typical and is provided for worst-case information.

• Read/write power and current

Read/write power is measured with the heads on track, based on a 16-sector write followed by a 32-msec delay, then a 16-sector read followed by a 32-msec delay.

• Operating power and current

Operating power is measured using 40 percent random seeks, 40 percent read/write mode (1 write for each 10 reads) and 20 percent drive idle mode.

• Idle mode power

Idle mode power is measured with the drive up to speed, with servo electronics active and with the heads in a random track location.

• Standby mode

During Standby mode, the drive accepts commands, but the drive is not spinning, and the servo and read/ write electronics are in power-down mode.

Table 3:

DC power requirements

 

 

 

 

 

 

 

Power dissipation (4-disc values shown)

Avg (watts 25° C)

Avg 5V typ amps

Avg 12V typ amps

 

 

 

 

 

Spinup

 

—

—

2.80 (peak)

 

 

 

 

 

Idle*

 

7.96

0.320

0.530

 

 

 

 

Idle* (with offline activity)

9.29

0.610

0.520

 

 

 

 

Operating (40% r/w, 40% seek, 20% inop.)

11.16

0.600

0.680

 

 

 

 

Seeking (random, 20% idle)

10.42

0.500

0.660

 

 

 

 

 

Standby

 

0.99

0.150

0.020

 

 

 

 

 

Sleep

 

0.99

0.150

0.020

 

 

 

 

 

*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.

Barracuda ES.2 Serial ATA Product Manual, Rev. A

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Seagate ST3250310NS, ST31000340NS, ST3750330NS, ST3500320NS manual Power specifications
Page 16 Page 18

ST3750330NS, ST31000340NS, ST3250310NS, ST3500320NS specifications

Seagate has long been a leader in the hard drive market, providing various storage solutions for personal and enterprise needs. Among its notable models are the ST3500320NS, ST3320630NS, ST3250310NS, and ST3750330NS, tailored for different applications, particularly in data center environments.

The Seagate ST3500320NS is a 500GB SATA hard drive designed for high-performance computing. One of its key features is a spindle speed of 7200 RPM, which offers quick data access times, significantly reducing latency in read and write operations. This model supports a 3Gb/s SATA interface, ensuring compatibility with a wide range of systems. Another important characteristic of the ST3500320NS is its robust error recovery mechanism, which enhances data integrity, making it suitable for applications where data precision is critical.

The ST3320630NS, on the other hand, is a 320GB variant, also featuring a 7200 RPM spindle speed. This model includes advanced power management features, allowing for reduced energy consumption without sacrificing performance. The drive's design focuses on reliability, designed to handle the demands of continuous operation in RAID configurations or as part of a network-attached storage (NAS) solution. Its dual stage actuator technology ensures more precise positioning of the read/write heads, improving overall performance and durability.

Considered an entry-level model, the ST3250310NS boasts a capacity of 250GB and shares the 7200 RPM speed common to other models. This drive is tailored for cost-effective solutions, providing a balance of price, performance, and reliability for small to medium business environments. Its resilience to shock and vibration makes it suitable for use in mobile workstations and external drives.

Lastly, the ST3750330NS features a significant 750GB capacity while maintaining the same 7200 RPM speed. It offers enhanced caching capabilities with a 32MB buffer, improving data throughput and responsiveness. Designed for high-capacity storage needs, this model is optimized for streaming applications and heavy workloads, reinforcing Seagate's commitment to delivering good performance in demanding scenarios.

All these models embody Seagate's dedication to innovation and reliability, featuring technologies such as Native Command Queuing (NCQ) and S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology) to monitor drive health. With years of expertise, Seagate continues to set industry standards for storage solutions, making these models ideal for a variety of professional applications.
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