Table 23: 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

66

Cheetah 15K.5 FC Product Manual, Rev. D

Page 75 Page 77
Page 76
Image 76
Seagate ST3300655FC, ST3146855FC FC-AL transmitters and receivers, FC-SCA pin descriptions Pin Signal name Signal type
Page 75 Page 77

ST3146855FC, ST373455FC, ST3300655FC specifications

Seagate is renowned for its commitment to high-performance data storage solutions, and their range of enterprise drives, including the ST3300655FC, ST373455FC, and ST3146855FC, demonstrates this dedication. These models cater to businesses requiring robust, reliable, and efficient hard disk drives (HDDs) designed for demanding environments.

The ST3300655FC offers a capacity of 300 GB, making it suitable for a variety of enterprise applications. It utilizes a 15,000 RPM spindle speed, which significantly enhances its performance, delivering quick read and write times. This drive supports Serial Attached SCSI (SAS) interface, ensuring faster data transfer rates and reliability essential for critical computing environments. The dual-port connectivity of SAS allows for enhanced fault tolerance and redundancy, making the ST3300655FC ideal for data centers and enterprise storage systems.

Following closely, the ST373455FC provides a slightly larger capacity of 734 GB while maintaining the same 15,000 RPM speed. This drive's design focuses on high availability, making it an excellent choice for applications that require continuous uptime. Like its counterpart, it also benefits from the SAS interface, ensuring that data can be accessed quickly and reliably. The robust construction of the ST373455FC guarantees consistent performance under heavy workloads, an essential characteristic for enterprise use.

The ST3146855FC, with a capacity of 146 GB, offers a balance between speed and storage for enterprises that do not require the larger capacities provided by the other two models. It also operates at 15,000 RPM, benefiting from similar technological advancements as the ST3300655FC and ST373455FC. This drive maintains compatibility with existing systems, making it a versatile option for organizations looking to upgrade their storage solutions without overhauling their infrastructure.

All three models exhibit Seagate's commitment to durability and low power consumption, which is critical for reducing operational costs in data centers. They also feature advanced error recovery and data integrity technologies, ensuring that critical data remains intact and accessible. Enhanced thermal and vibration tolerance further extends the lifespan of these drives in challenging environments.

In summary, the Seagate ST3300655FC, ST373455FC, and ST3146855FC are tailored to meet the rigorous demands of enterprise environments. Their high spindle speeds, SAS connectivity, and robust designs make them exemplary choices for businesses seeking reliable and efficient storage solutions. Their distinctive features and technologies ensure that they deliver outstanding performance, data integrity, and durability, making them invaluable assets in any data-driven organization.
Top Page Image Contents