Seagate ST4000VM000 manual Serial ATA Interface, Segment Pin Function Definition

4.0 Serial ATA 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.

4.1Hot-Plug compatibility

Video 3.5 HDD drives incorporate connectors which enable you to hot plug these drives in accordance with the Serial ATA Revision 2.5 specification. This specification can be downloaded from www.serialata.org.

4.2Serial 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
	S1	Ground	2nd mate
	S2	A+	Differential signal pair A from PHY
	S3	A-
Signal	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

Video 3.5 HDD Product Manual, Rev. H 29