Table 13: ST936701SS DC power requirements

 

 

 

 

 

 

 

ST936701SS

ST936701SS

 

 

 

 

 

 

 

3 Gbit mode

1.5 Gbit mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Notes

(Amps)

(Amps)

(Amps)

(Amps)

 

 

 

 

 

 

 

Voltage

 

 

+5V

+12V [2]

+5V

+12V [2]

 

 

 

 

 

 

 

Regulation

 

[5]

±5%

±5% [2]

±5%

±5% [2]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[1] [7]

1.06

0.18

1.06

0.18

Avg idle current DCX

 

 

Maximum starting current

 

 

 

 

 

 

 

 

 

 

 

 

(peak DC) DC

3σ

[3]

1.19

1.81

1.19

1.82

(peak AC) AC

3σ

[3]

1.42

2.94

1.41

2.93

 

3σ

 

 

 

 

 

Delayed motor start (max) DC

[1] [4]

1.05

0.05

1.05

0.05

Peak operating current:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[1] [6]

1.08

0.47

0.98

0.46

Typical DCX

 

 

Maximum DC

3σ

[1]

1.09

0.50

0.99

0.47

Maximum (peak) DC

3σ

 

1.46

1.46

1.34

1.48

 

 

 

 

 

 

 

 

 

 

 

[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 with 295 I/Os per second for ST973401SS drives and 285 I/Os per second for ST936701SS drives. Current and power specified at nominal voltages. Decreasing +5 volt supply by 5% increases 5 volt current by 3.2%. Decreasing +12 volt supply by 5% increases 12 volt current by 2.1% for ST973401SS models (2% for ST936701SS models).

[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 SAS Product Manual, Rev. D

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Seagate ST973401SS manual ST936701SS DC power requirements, General DC power requirement notes, ST936701SS Gbit mode Amps
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ST936701SS, ST973401SS specifications

The Seagate ST936701SS and ST973401SS are high-performance enterprise hard drives designed for optimal data storage solutions in demanding environments. Both models belong to Seagate's Savvio series, which is renowned for its reliability and efficiency. These drives are tailored for critical applications such as database management, data warehousing, and online transaction processing.

The ST936701SS comes with a storage capacity of 36.4 GB, while the ST973401SS offers a larger capacity of 73.4 GB. This variance allows users to choose the drive that best suits their storage needs without compromising performance. Both drives utilize a 2.5-inch form factor, making them compact and suitable for high-density storage configurations.

A key feature of these drives is their impressive rotational speed of 10,000 RPM, which enhances data access times and improves overall system responsiveness. This speed allows for reduced latency and faster data transfer rates, critical for applications that require quick retrieval of large datasets.

In terms of technology, these drives utilize the Serial Attached SCSI (SAS) interface, which is favored in enterprise settings for its reliability and speed. SAS provides better performance than traditional SATA drives, particularly when dealing with high workloads, as it supports multiple concurrent connections and higher data throughput.

The ST936701SS and ST973401SS are also equipped with advanced features such as Seagate's Native Command Queuing (NCQ), which optimizes the order in which read and write commands are executed. This results in improved performance under multi-tasking conditions, essential for enterprise servers managing multiple requests simultaneously.

Additionally, both drives incorporate features aimed at enhancing data integrity and reliability. They support End-to-End Data Protection and are designed to endure the rigors of continuous operation, with MTBF (Mean Time Between Failures) ratings that bolster their reputation for durability.

Energy efficiency is another notable characteristic, as both drives are designed to reduce power consumption without sacrificing performance. This is particularly important in enterprise environments where power management contributes to lower operational costs.

In conclusion, the Seagate ST936701SS and ST973401SS drives are robust, reliable storage solutions tailored for enterprise applications. With their high performance, advanced technology features, and capacity options, they provide organizations with the scalability and efficiency required in today’s data-driven landscape. Whether it's for critical data management tasks or high-access applications, these drives stand out as a solid choice for any enterprise storage strategy.
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