Since I always get confused with SAS and SATA connectors, some tables from Wikipedia:
- Serial Attached SCSI Connectors- Wikipedia
Codename Other names Ext./int. Pins No of devices / lanes Comment Image SFF-8086 Internal mini-SAS, internal mSAS Internal 26 4 This is a less common implementation of SFF-8087 than the 36-circuit version. The fewer positions is enabled by it not supporting sidebands. 
SFF-8087 Internal mini-SAS, internal mSAS, internal iSAS, internal iPass Internal 36 4 Unshielded 36-circuit implementation of SFF-8086. Molex iPass reduced width internal 4× connector, 12 Gbit/s capability. 
SFF-8088 External mini-SAS, external mSAS, external iSAS, external iPass External 26 4 Shielded 26-circuit implementation of SFF-8086. Molex iPass reduced width external 4× connector, 12 Gbit/s capability. 
SFF-8470 InfiniBandCX4 connector, Molex LaneLink External 34 4 High-density external connector (also used as an internal connector). 
SFF-8482 Internal 29 2 lanes This form factor is designed for compatibility with SATA but can drive a SAS device. A SAS controller can control SATA drives, but a SATA controller cannot control SAS drives. 
SFF-8484 Internal 32 or 19 4 or 2 High-density internal connector, 2 and 4 lane versions are defined by the SFF standard. 
SFF-8485 Defines SGPIO (extension of SFF 8484), a serial link protocol used usually for LED indicators. SFF-8613 (SFF-8643) Internal 36 4 or 8 with dual connector Mini-SAS HD (introduced with SAS 12 Gbit/s) 
SFF-8614 (SFF-8644) External 4 or 8 with dual connector Mini-SAS HD (introduced with SAS 12 Gbit/s) 
Sideband connector Internal Often seen with 1× SFF-8643 or 1× SFF-8087 on the other end – internal fan-out for 4× SATA drives. Connects the controller to drives without backplane or to the (SATA) backplane and optionally, to the status LEDs. 
SFF-8680 Internal - 1
- (2 ports)
SAS 12 Gbit/s backplane connector SFF-8639 Internal 68 - 1
- (2 ports)
- SAS 12 Gbit/s backplane connector;
- revision of the SFF-8680.
- Also known as “U.2”.[17]
SFF-8638 - Four 1x ports at up to 24 Gb/s each;
- two 2x ports at up to 48 Gb/s each;
- one 4x port at up to 96 Gb/s.
SFF-8640 - Four 1x ports at up to 24 Gb/s each;
- two 2x ports at up to 48 Gb/s each;
- one 4x port at up to 96 Gb/s.[18]
SFF-8681 - Two 1x ports at up to 24 Gb/s each;
- one 2x ports at up to 48 Gb/s each.
- Serial ATA: Cables, connectors, and ports – Wikipedia
Data
Standard connector, data segment[42] Pin # Mating Function 1 1st Ground 2 2nd A+ (transmit) 3 2nd A− (transmit) 4 1st Ground 5 2nd B− (receive) 6 2nd B+ (receive) 7 1st Ground — Coding notch -
A seven-pin SATA data cable (left-angled version of the connector)
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SATA connector on a 3.5-inch hard drive, with data pins on the left and power pins on the right. The two different pin lengths ensure a specific mating order; the longer lengths are ground pins and make contact first.
Power
Standard
Standard connector, power segment Pin # Mating Function — Coding notch 1 3rd 3.3 V Power 2 3rd 3 2nd Enter/exit Power Disable (PWDIS) mode
(3.3 V Power, Pre-charge prior to SATA 3.3)4 1st Ground 5 2nd 6 2nd 7 2nd 5 V Power, Pre-charge 8 3rd 5 V Power 9 3rd 10 2nd Ground 11 3rd Staggered spinup/activity 12 1st Ground 13 2nd 12 V Power, Pre-charge 14 3rd 12 V Power 15 3rd 
A fifteen-pin SATA power connector (this particular connector is missing the orange 3.3 V wire)
Slimline
Slimline connector, power segment Pin # Mating Function — Coding notch 1 3rd Device presence 2 2nd 5 V Power 3 2nd 4 2nd Manufacturing diagnostic 5 1st Ground 6 1st -
A six-pin slimline SATA power connector
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The back of a SATA-based slimline optical drive
Micro
Micro connector, power segment Pin # Mating Function 1 3rd 3.3 V Power 2 2nd 3 1st Ground 4 1st 5 2nd 5 V Power 6 3rd 7 3rd Reserved — Coding notch 8 3rd Vendor specific 9 2nd 
A 1.8-inch (46 mm) micro SATA hard drive with numbered data and power pins on the connector.
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–jeroen
The Wiert Corner - irregular stream of stuff 