Ok, running down the SATA pin locations...I would like some help interpeting this data. I think it means that I can run two 5V 1.5A plates from the connector in the second drive bay.http://en.wikipedia.org/wiki/Serial_ATA#Power_supply
Power supply Standard connector
Pin #MatingFunction —coding notch13rd3.3 V23rd32nd41stGround52nd62nd72nd5 V83rd93rd102ndGround113rdStaggered spinup
(in supporting drives)121stGround132nd12 V143rd153rd
A 15-pin Serial ATA power receptacle. This connector does not
provide the extended pins 4 and 12 needed for hot-plugging
The SATA standard specifies a different power connector
than the decades-old four-pin Molex connector
found on pre-SATA devices. Like the data cable, it is wafer-based, but its wider 15-pin shape prevents accidental mis-identification and forced insertion of the wrong connector type. Native SATA devices favor the SATA power-connector, although some early SATA drives retained older 4-pin Molex in addition to the SATA power connector.
SATA features more pins than the traditional connector for several reasons:
- A third voltage is supplied, 3.3 V, in addition to the traditional 5 V and 12 V.
- Each voltage transmits through three pins ganged together, because the small contacts by themselves cannot supply sufficient current for some devices. (Each pin should be able to provide 1.5 A.)
- Five pins ganged together provide ground.
- For each of the three voltages, one of the three pins serves for hotplugging. The ground pins and power pins 3, 7, and 13 are longer on the plug (located on the SATA device) so they will connect first. A special hot-plug receptacle (on the cable or a backplane) can connect ground pins 4 and 12 first.
- Pin 11 can function for staggered spinup, activity indication, or nothing. Staggered spinup is used to prevent many drives from spinning up simultaneously, as this may draw too much power. Activity is an indication of whether the drive is busy, and is intended to give feedback to the user through a LED.
Adapters exist which can convert a 4-pin Molex connector
to a SATA power connector. However, because the 4-pin Molex connectors do not provide 3.3 V power, these adapters provide only 5 V and 12 V power and leave the 3.3 V lines unconnected. This precludes the use of such adapters with drives that require 3.3 V power. Understanding this, drive manufacturers have largely left the 3.3 V power lines unused.