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Barracuda XT SATA Product Manual, Rev. D 27
4.0 SATA Interface
These drives use the industry-standard Serial ATA(SATA) interface that supports FIS data transfers. It supports
ATA programmed input/output (PIO) modes 0 to 4; multiword DMA modes 0 to 2, and Ultra DMA modes 0 to 6.
For detailed information about the Serial ATA interface, refer to the “Serial ATA: High Speed Serialized AT
Attachment” specification.
4.1 Hot-Plug compatibility
Barracuda drives incorporate connectors which enable you to hot plug these drives in accordance with the Serial
ATA Revision 2.6 specification. This specification can be downloaded from www.serialata.org.
4.2 Serial ATA device plug connector pin definitions
Table 6 summarizes the signals on the Serial ATA interface and power connectors.
Table 6 Serial ATA connector pin definitions
Segment Pin Function Definition
Signal
S1 Ground 2nd mate
S2 A+ Differential signal pair A from Phy
S3 A-
S4 Ground 2nd mate
S5 B- Differential signal pair B from Phy
S6 B+
S7 Ground 2nd mate
Key and spacing separate signal and power segments
Power
P1 V
33
3.3V power