11.4.2 Physical Characteristics; 11.4.3 Connector Requirements; 11.4.4 Electrical Description; 11.4.5 Pin Descriptions - Seagate ST2400MM0129 Product Manual

11.4.2 Physical characteristics

This section defines physical interface connector.

11.4.3 Connector requirements

Contact a 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 connector manufacturers.
The SAS device connector is illustrated in Figures 15 and 16.

11.4.4 Electrical 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.

11.4.5 Pin descriptions

This section provides a pin-out of the SAS device and a description of the functions provided by the pins.
Table 17 SAS pin descriptions
Pin Signal name
S1 Port A Ground
S2* +Port A_in
S3* -Port A_in
S4 Port A Ground
S5* -Port A_out
S6* +Port A_out
S7 Port A Ground
S8 Port B Ground
S9* +Port B_in
S10* -Port B_in
S11 Port A Ground
S12* -Port B_out
S13* +Port B_out
S14 Port B Ground
* - Short pin to support hot plugging
** - Power Disable (T10 Industry Standard) for remote management of the end device.
Allows power cycling / power saving to be controlled by the host via interface pin 3.
Pin P3 of the power connector on the interface may be pulled high, above 1.8V, to shut off power to the drive.
Pulling pin p3 low, below 0.7V (but not negative), allows the drive to run.
NC - No connection in the drive.
Seagate Enterprise Performance 10K HDD v9 Product Manual, Rev. D (Draft 2)
Signal type
Diff. input pair
Diff output pair
Diff. input pair
Diff output pair
Pin Signal name
P1* NC (reserved 3.3Volts)
P2* NC (reserved 3.3Volts)
P3 SAS Power Disable **
P4 Ground
P5 Ground
P6 Ground
P7 5 Volts charge
P8* 5 Volts
P9* 5 Volts
P10 Ground
P11* Ready LED
P12 Ground
P13 12 Volts charge
P14* 12 Volts
P15* 12 Volts
Signal type
Open collector out
63