Table 13: ST973402SS DC power requirements

 

 

 

 

 

 

 

ST973402SS

 

ST973402SS

 

 

 

 

 

 

 

 

1.5 Gbit mode

 

3.0 Gbit mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Notes

(Amps)

 

(Amps)

(Amps)

 

(Amps)

 

 

 

 

 

 

 

 

 

Voltage

 

 

+5V

 

+12V [2]

+5V

 

+12V [2]

 

 

 

 

 

 

 

 

 

Regulation

 

[5]

±5%

 

±5% [2]

±5%

 

±5% [2]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[1] [7]

0.81

 

0.13

0.79

 

0.12

Avg idle current DCX

 

 

 

 

Maximum starting current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(peak DC) DC

3σ

[3]

0.88

 

1.38

0.87

 

1.38

(peak AC) AC

3σ

[3]

1.25

 

1.91

1.36

 

1.91

 

3σ

 

 

 

 

 

 

 

Delayed motor start (max) DC

[1] [4]

0.66

 

0.03

0.69

 

0.03

Operating current:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[1] [6]

0.65

 

0.31

0.81

 

0.34

Typical DCX

 

 

 

 

Maximum DC

3σ

[1]

0.79

 

0.37

0.84

 

0.39

Maximum (peak) DC

3σ

 

1.41

 

1.17

1.43

 

1.17

 

 

 

 

 

 

 

 

 

 

 

 

 

Gen 3.5 LPSS measured data (latest available) plus 12V max start current margins of .15A for DC and .20A for AC. All others have 10% margin added.

[1]Measured with average reading DC ammeter. Instantaneous +12V current peaks will exceed these val- ues. Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.

[2]For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching 9,936 RPM. The ±5% must be maintained after the drive signifies that its power-up sequence has been completed and that the drive is able to accept selection by the host initiator.

[3]See +12V current profile in Figure 2.

[4]This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup primitive.

[5]See paragraph 6.2.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient response.

[6]Operating condition is defined as random 8 block reads.

[7]During idle, the drive heads are relocated every 60 seconds to a random location within the band from three-quarters to maximum track.

General DC power requirement notes.

1.Minimum current loading for each supply voltage is not less than 1.7% of the maximum operating current shown.

2.The +5V and +12V supplies should employ separate ground returns.

3.Where power is provided to multiple drives from a common supply, careful consideration for individual drive power requirements should be noted. Where multiple units are powered on simultaneously, the peak starting current must be available to each device.

4.Parameters, other than spindle start, are measured after a 10-minute warm up.

5.No terminator power.

26

Savvio 10K.2 SAS Product Manual, Rev. B

Page 35 Page 37
Page 36
Image 36
Seagate ST9146802SS ST973402SS DC power requirements, General DC power requirement notes, ST973402SS Gbit mode Amps
Page 35 Page 37

ST973402SS, ST9146802SS specifications

The Seagate ST973402SS and ST9146802SS are high-performance, enterprise-grade hard drives designed to meet the demanding needs of data-intensive applications. These drives are part of Seagate's Savvio and Barracuda product lines, aimed specifically at businesses and institutions requiring reliability, speed, and efficiency in storage solutions.

The ST973402SS is a 73GB, 2.5-inch hard drive, while the ST9146802SS offers a larger capacity of 146GB. Both models utilize a 10,000 RPM spindle speed, which significantly enhances their ability to handle fast data read and write operations. This speed ensures reduced latency and improved overall performance, making them ideal for environments where rapid access to data is crucial.

One of the standout features of these drives is their support for Serial Attached SCSI (SAS) interface. SAS technology provides a point-to-point connection, which allows for increased data transfer rates compared to traditional SATA drives. The ST973402SS and ST9146802SS are capable of transferring data at speeds of up to 600 MB/s, facilitating efficient data transfers in enterprise systems.

In terms of reliability, both models offer advanced features designed to improve data integrity and durability. They are built to withstand high workloads, with an annualized workload rate of up to 550 TB per year. This makes them well-suited for applications like databases and transactional storage, where sustained performance is required. Additionally, the drives feature Seagate’s PowerFit technology, which optimizes performance while minimizing power consumption.

To enhance data security, the drives come equipped with self-encrypting technology, ensuring that sensitive data is protected through hardware-based encryption. This is particularly important in environments where data breaches can lead to significant operational impacts.

The drives are also designed to operate efficiently in terms of thermal management, featuring robust heat dissipation capabilities. This helps to maintain optimal performance levels while prolonging the lifespan of the drives.

Overall, the Seagate ST973402SS and ST9146802SS are robust and reliable hard drives that cater to the needs of enterprise environments, combining high capacity, exceptional speed, advanced security features, and energy efficiency to help businesses maintain and manage large volumes of data effectively. With their proven performance and innovative technologies, these drives are well-equipped to support a wide range of applications in modern data centers.
Top Page Image Contents