Cheetah 10K.6 FC Product Manual, Rev. B

19

6.0Physical/electrical specifications

This section provides information relating to the physical and electrical characteristics of the drive.

6.1AC power requirements

None.

6.2DC power requirements

The voltage and current requirements for a single drive are shown below. Values indicated apply at the drive connector.

Table 1:

DC power requirements

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ST3146807FC

ST373307FC

ST336607FC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Notes

(Amps)

(Amps)

(Amps)

(Amps)

(Amps)

(Amps)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Voltage

 

 

 

 

 

 

+5V [8]

+12V [2]

+5V [8]

+12V [2]

+5V [8]

+12V [2]

 

 

 

 

 

 

 

 

 

 

 

 

 

Regulation

 

 

 

 

 

[5]

±5%

±5% [2]

±5%

±5% [2]

±5%

±5% [2]

 

 

 

 

 

 

 

 

 

 

 

 

Avg idle current DC

 

 

 

 

[1] [7]

0.92

0.51

0.91

0.37

0.93

0.27

 

X

 

 

 

 

 

 

 

 

 

 

 

 

Maximum starting current

 

 

 

 

 

 

 

 

 

 

 

(peak DC) DC

 

3σ

[3]

1.09

1.48

1.02

1.26

0.99

1.04

(peak AC) AC

3σ

[3]

1.38

2.61

1.36

2.30

1.30

1.94

 

 

 

 

 

 

 

 

 

Delayed motor start (max) DC

3σ

[1] [4]

0.70

0.02

0.70

0.02

0.71

0.02

 

 

 

 

 

 

 

 

 

 

 

 

Peak operating current:

 

 

 

 

 

 

 

 

 

 

 

Typical DC

 

 

 

[1] [6]

0.97

0.94

0.97

0.88

0.99

0.75

 

X

Maximum DC

 

3σ

[1]

0.99

0.95

0.98

0.89

1.00

0.78

Maximum (peak) DC

 

3σ

 

1.50

2.40

1.54

2.30

1.46

2.06

 

 

 

 

 

 

 

 

 

 

 

 

 

[1]Measured with average reading DC ammeter. Instantaneous +12V current peaks will exceed these val- ues. Power supply at nominal voltage. Number of drives tested = 6, 22 Degrees C ambient.

[2]For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching 10,000 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 3.

[4]This condition occurs when the Motor Start option is enabled and the drive has not yet received a Start Motor command.

[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 at (ST3146807 at 234, ST373307 at 239 and ST336607 at 239) I/Os per second. Current and power specified at nominal voltages. Decreasing +5 volt supply by 5% increases 5 volt current by 3.6%. Decreasing +12 volt supply by 5% increases 12 volt cur- rent by 3%.

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

[8]Values shown are for operation at 2 Gb; for operation at 1 Gb, reduce the +5V by 0.10 amps. The +12V current values are not affected by loop speed.

General DC power requirement notes.

1.Minimum current loading for each supply voltage is not less than 0.8% of the maximum operating current shown.

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

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Seagate ST373307FC, ST3146807FC manual Physical/electrical specifications, AC power requirements, DC power requirements
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ST336607FC, ST373307FC, ST3146807FC specifications

The Seagate ST373307FC, ST3146807FC, and ST336607FC are robust hard disk drives designed for enterprise environments where reliability and performance are critical. Each model offers distinct features suited to various data storage needs, reflecting Seagate's commitment to innovation in storage technology.

The ST373307FC is a 73GB Fibre Channel hard drive that operates at 15,000 RPM, making it exceptionally fast for read and write operations. This drive employs a 4GB cache, enhancing its performance by allowing quicker access to frequently used data. With a 3.5-inch form factor, the ST373307FC is built for high-density environments, delivering reliable access to data. Its Fibre Channel interface supports high-speed connections, essential for data-intensive applications like databases and virtualization.

Next in line, the ST3146807FC offers a capacity of 146GB, also operating at 15,000 RPM. This drive features an 8GB cache, which significantly improves its data transfer rates, making it ideal for transactional workloads. The ST3146807FC is engineered to minimize latency and maximize throughput, ensuring that enterprises can access critical data swiftly and efficiently. Additionally, its rugged construction is designed to withstand the demands of continuous operation, providing peace of mind for businesses with strict uptime requirements.

Lastly, the ST336607FC has a substantial storage capacity of 300GB and shares the 15,000 RPM operational speed that characterizes this high-performance line. With a similar 8GB cache as the ST3146807FC, it offers excellent performance for read-intensive and write-heavy applications. The ST336607FC is also designed with enhanced thermal management features, supporting cooler operations in densely packed server environments. This model is particularly suited for applications such as data warehousing and online transaction processing, where speed and reliability are paramount.

Each of these drives utilizes advanced technologies like Native Command Queuing (NCQ), which optimizes the order of read and write requests. These features, combined with Seagate's reputation for durability and performance, make the ST373307FC, ST3146807FC, and ST336607FC excellent choices for enterprise applications requiring high-speed data access and exceptional reliability. In environments where data integrity and uptime are critical, these drives provide the robust performance necessary to meet demanding storage needs.
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