12.4.2Physical characteristics

This section defines physical interface connector.

12.4.3Connector requirements

Contact your preferred connector manufacturer for mating part information. Part numbers for SAS connectors will be provided in a future revision of this publication when production parts are available from major connec- tor manufacturers.

The SAS device connector is illustrated in Figures 17 and 18.

12.4.4Electrical description

SAS drives use the device connector for:

DC power

SAS interface

Activity LED

This connector is designed to either plug directly into a backpanel or accept cables.

12.4.5Pin descriptions

This section provides a pin-out of the SAS device and a description of the functions provided by the pins.

Table 15: SAS pin descriptions

Pin

Signal name

Signal type

 

 

 

 

 

 

S1

Port A Ground

 

 

 

 

S2*

+Port A_in

Diff. input pair

 

 

 

S3*

-Port A_in

 

 

 

 

S4

Port A Ground

 

 

 

 

S5*

-Port A_out

Diff output pair

 

 

 

S6*

+Port A_out

 

 

 

 

S7

Port A Ground

 

 

 

 

S8

Port B Ground

 

 

 

 

S9*

+Port B_in

Diff. input pair

 

 

 

S10*

-Port B_in

 

 

 

 

S11

Port A Ground

 

 

 

 

S12*

-Port B_out

Diff output pair

 

 

 

S13*

+Port B_out

 

 

 

 

S14

Port B Ground

 

 

 

 

 

 

 

*- Short pin to support hot plugging NC - No connection in the drive.

Pin

Signal name

Signal type

 

 

 

 

 

 

P1*

NC (reserved 3.3Volts)

 

 

 

 

P2*

NC (reserved 3.3Volts)

 

 

 

 

P3

NC (reserved 3.3Volts)

 

 

 

 

P4

Ground

 

 

 

 

P5

Ground

 

 

 

 

P6

Ground

 

 

 

 

P7

5 Volts charge

 

 

 

 

P8*

5 Volts

 

 

 

 

P9*

5 Volts

 

 

 

 

P10

Ground

 

 

 

 

P11*

Ready LED

Open collector out

 

 

 

P12

Ground

 

 

 

 

P13

12 Volts charge

 

 

 

 

P14*

12 Volts

 

 

 

 

P15*

12 Volts

 

 

 

 

Constellation ES.1 SAS Product Manual, Rev. E

69

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Seagate ST2000NM0001 manual Physical characteristics, Connector requirements, Electrical description, Pin descriptions

ST2000NM0001, ST1000NM0041, ST500NM0001, ST2000NM0021, ST1000NM0021 specifications

Seagate is a renowned leader in data storage solutions, offering a wide array of hard disk drives (HDDs) suitable for various applications. Among their product lineup, the Seagate ST2000NM0041, ST500NM0021, ST500NM0041, ST1000NM0001, and ST1000NM0021 stand out as reliable options tailored for enterprise environments and general storage needs.

The Seagate ST2000NM0041 is a 2TB 7200 RPM drive designed for high-performance workloads in data centers. One of its key features is the use of the SATA III interface, providing data transfer speeds of up to 6 Gbps, ensuring quick access to data. This model supports advanced error recovery controls and features enhanced power management capabilities, which contribute to its reliable performance and energy efficiency.

Next, the ST500NM0021 and ST500NM0041 are both 500GB drives that cater to different consumer needs. The ST500NM0021 is a 5400 RPM drive, typically used in scenarios where lower power consumption is vital, such as in compact systems or external storage configurations. Its efficient design enables quieter operation, making it ideal for environments that require minimal noise. Conversely, the ST500NM0041 operates at a speed of 7200 RPM, making it suitable for more demanding applications that require swift read and write speeds. Both models utilize Serial ATA for connectivity, ensuring compatibility with a wide range of systems.

The ST1000NM0001 and ST1000NM0021 are 1TB drives that provide versatility across different platforms. Similar to their 500GB counterparts, the ST1000NM0001 features a 7200 RPM speed, optimizing performance for applications requiring faster data processing. In contrast, the ST1000NM0021 operates at 5400 RPM, designed for users prioritizing energy efficiency over speed, like in desktop and external storage solutions. Each of these drives supports advanced technologies such as Native Command Queuing (NCQ), which enhances performance by allowing multiple commands to be executed simultaneously.

Overall, the Seagate ST series hard drives offer flexible storage options for a variety of applications. With their robust features, including varied RPM speeds, power management, and compatibility with SATA connections, these drives cater to the needs of both consumer and enterprise markets, establishing Seagate as a trusted provider in the storage arena.