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Over many years and device generations Samsung SSD have featured a set of internal contacts. On the image below, i mean the row of 7 "plated holes" at the top center of the image.

Can anybody tell me with certainty what they are? And if so, what their pinouts are?

enter image description here

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Nobody would be able to tell you ( with certainty ) the holes are for without detail technical specifications and perhaps even a circuit diagram. Lookiing at the picture they are connected to the rest of the circuit. –  Ramhound Feb 1 '13 at 18:41
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Only a Samsung engineer could tell you with certainty, and their employer would most likely prohibit it due to the proprietary nature.

In general, undocumented interfaces like that on circuit boards are used for development and acceptance testing purposes. They usually consist of a JTAG or other sort of in circuit programming/debugging interface. It's used to program the firmware and unique serial numbers at manufacture time, as well as to test for proper soldering and electrical functionality. There may also be a serial terminal interface for viewing boot and other log messages for troubleshooting and development purposes.

Sometimes engineers put extra connections purely for prototyping purposes. They want to be able to experiment on a new part or something, but PCBs are expensive to produce, so they will build flexibility into the board. Because they don't want to redo layout and everything, those vestigial connections might remain on the board even though the experiment has concluded.

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This is the most likely explanation. It's probably used for programming the device firmware and serial number and automated testing using boundary scan. –  David Schwartz Feb 1 '13 at 20:00
    
Karl I agree with you that they are likely diagnostic/manufacturing in nature. Though I was hoping for an answer that gave the specifications to allow reflashing the firmware. Thanks anyway. –  ARF Feb 1 '13 at 20:52
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