SATA drive
Pin
Signal
Pin
Signal
Pin
Signal
Data Cable
Power Cable
Power Cable
S2*
A+
P2
3.3V power
P9
5V power
S3*
A-
P3
3.3V power
P10
Ground
S4
Ground
P4
Ground
P11
Reserved
S5**
B-
P5
Ground
P12
Ground
S6**
B+
P6
Ground
P13
12V power
S7
Ground
P7
5V power
P14
12V power
* S2 and S3 differential signal pair
**S5 and S6 differential signal pair
P15
12V power
SAS drive
Segment
Pin
Backplane
receptacle
Plug and
cable
receptacles
Primary signal segment
S1
SIGNAL GROUND
S2
TP+
RP+
S3
TP-
RP-
S4
SIGNAL GROUND
S5
RP-
TP-
S6
RP+
TP+
S7
SIGNAL GROUND
Secondary signal segment
S8
SIGNAL GROUND
S9
TS+
RS+
S10
TS-
RS-
S11
SIGNAL GROUND
S12
RS-
TS-
S13
RS+
TS+
S14
SIGNAL GROUND
ENWW
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