Table 27: FC-SCA pin descriptions

Pin

Signal name

Signal type

 

 

 

1*

-EN bypass port A

Low Voltage TTL output

 

 

 

2*

12 Volts

 

 

 

 

3*

12 Volts

 

 

 

 

4*

12 Volts

 

 

 

 

5*

-Parallel ESI

 

 

 

 

6*

Ground[1]

 

7*

Active LED out

Open collector out

 

 

 

8*

Reserved

 

 

 

 

9*

Start_1[2]

TTL input

10*

Start_2[2]

TTL input

11*

-EN bypass port B

Low Voltage TTL output

 

 

 

12*

SEL_6

TTL input/output

 

 

 

13*

SEL_5

TTL input/output

 

 

 

14*

SEL_4

TTL input

 

 

 

15*

SEL_3

TTL input/output

 

 

 

16*

Fault LED out

Open collector out

 

 

 

17*

DEV_CTRL_CODE_2[2]

TTL input

18*

DEV_CTRL_CODE_1[2]

TTL input

19*

5 Volts

 

 

 

 

20*

5 Volts

 

 

 

 

Pin

Signal name

Signal type

 

 

 

21

12 Volts charge

 

 

 

 

22

Ground

 

 

 

 

23

Ground

 

 

 

 

24*

+Port A_in

FC Diff. input pair

 

 

 

25*

-Port A_in

 

 

 

 

26

Ground

 

 

 

 

27*

+Port B_in

FC Diff. input pair

 

 

 

28*

-Port B_in

 

 

 

 

29

Ground

 

 

 

 

30*

+Port A_out

FC Diff. output pair

 

 

 

31*

-Port A_out

 

 

 

 

32

Ground

 

 

 

 

33*

+Port B_out

FC Diff. output pair

 

 

 

34*

-Port B_out

 

 

 

 

35

Ground

 

 

 

 

36

SEL_2

TTL input/output

 

 

 

37

SEL_1

TTL input/output

 

 

 

38

SEL_0

TTL input/output

 

 

 

39

DEV_CTRL_CODE_0[2

TTL input

40

5 Volts charge

 

 

 

 

*Short pins in mating backpanel connector.

[1]This pin may be connected to external logic to detect the presence of the drive. The drive connects this pin to the common ground.

[2]Pins 9, 10, 17, 18, and 39 are option select pins and are tied high by the drive circuitry. The preferred elec- trical connection at the backplane is either open or grounded (open for the ‘1’ setting, grounded for the ‘0’ setting). Alternatively, these pins may be driven by a 3.3V logic device, pulled up to 3.3V through a pull-up resistor (recommended size of 10k ohm), or grounded through some other means.

9.5.5FC-AL transmitters and receivers

A typical FC-AL differential copper transmitter and receiver pair is shown in Figure 17. The receiver is required to provide the AC coupling to eliminate ground shift noise.

TX

Transmitter 100

TY

.01

Differential

Transfer Medium

.01

RX

Receiver 100

RY

Figure 17. FC-AL transmitters and receivers

70

Cheetah 15K.6 FC Product Manual, Rev. D

Page 75 Page 77
Page 76
Image 76
Seagate ST3450856FC manual FC-AL transmitters and receivers, FC-SCA pin descriptions Pin Signal name Signal type
Page 75 Page 77

ST3450856FC specifications

The Seagate ST3146356FC, ST3300656FC, and ST3450856FC are hard disk drives designed for enterprise storage solutions, showcasing Seagate’s commitment to performance, reliability, and advanced technology in the data storage sector. These drives cater primarily to the needs of data centers and businesses requiring robust data management capabilities.

The ST3146356FC is notable for its 146GB capacity, 3.5-inch form factor, and 10,000 RPM spindle speed. It employs Serial Attached SCSI (SAS) interface technology, which ensures high data transfer rates and reliable connectivity. This model is designed to handle a multitude of demanding applications, such as online transaction processing and enterprise resource planning, requiring fast access to data and minimized latency.

The ST3300656FC, with a capacity of 300GB, continues the trend of high performance set by its predecessor. This drive also features the 10,000 RPM spindle speed and SAS interface, providing enhanced data throughput and optimized performance for intensive workloads. The drive is built with advanced error recovery features that enhance data integrity and reliability, making it suitable for critical applications where data loss is unacceptable.

The ST3450856FC offers even greater capacity, with a robust 450GB storage option. Like the other models, it operates at 10,000 RPM and utilizes the SAS interface. This drive is designed for scalability, ensuring that it can meet the evolving storage demands of enterprises. It is also equipped with sophisticated technologies such as Seagate's Enhanced S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology), providing continual monitoring of the drive’s health and performance metrics.

All three models share key characteristics, including advanced thermal and power management technologies that help maintain optimal operating temperatures and reduce energy consumption. This is crucial in data center environments where maximizing efficiency is vital for operational cost management. Additionally, Seagate's commitment to low acoustic noise levels ensures quieter operation, which is beneficial in environments where sound levels must be controlled.

In summary, the Seagate ST3146356FC, ST3300656FC, and ST3450856FC drives are engineered for enterprise environments demanding high reliability, speed, and capacity. Their advanced technologies, including SAS interface and enhanced error management systems, make these drives ideal for critical applications in data-intensive sectors. With reinforced durability, effectiveness in managing large volumes of data, and a focus on energy efficiency, these drives symbolize the pinnacle of Seagate's storage innovations for enterprise solutions.
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