[SOLVED] Should there be continuity from data to power side of SATA / USB adapter?

chuffedas

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Feb 20, 2009
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I bought a medium priced usb to SATA adapter to plug a 2.5 inch hdd or ssd into a pi.
Sort of five pounds type cost.
A simple enough cable I thought.

Should there be continuity between the power side to the data side please?

One of these:
https://www.ebay.co.uk/itm/203234477752?mkevt=1&mkpid=0&emsid=e11050.m43.l1123&mkcid=7&ch=osgood&euid=016813bb2bd84c26b28170c4912525d7&bu=43040875434&osub=-1~1&crd=20210517100258&segname=11050&sojTags=ch=ch,bu=bu,osub=osub,crd=crd,segname=segname,chnl=mkcid
 

chuffedas

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When I run my continuity tester between the two there is a circuit.
So there is an electrical connection between the two.
(data and power connectors.)

(If that makes sense?)
 

chuffedas

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OK, brilliant, thank you.
I have only poked on the sata end and only roughly.
I will need to get something smaller to have a more accurate poke :)

I was surprised that anything from the data side connected to anything in the power side.
My thinking was that inside a pc, the cables are completely separate.
But I see what you are saying, they would both need to connect to the same ground in the USB end wouldn't they.

Thank you very much. That is a huge help.
I shall have a play again.
 

chuffedas

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If you're poking only at the SATA connector, the only thing I'd expect to have continuity are pins 1,4, and 7 on the data side to pins 4-6, 10, and 12 on the power side because those are ground.
Thanks again for this.
I have continuity between 1,4,7 on the data side and 4-12 on the power side.
 

chuffedas

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Pins 7-9 on the power side should not be connected to ground.
Thank you very much for your confirmation.
I could not work out some things atg the time.
My ssd was not formatting right, then it failed completely, even popped the circuit in my place when I plugged it into pc.
An hdd was clicking when plugged into adapter.
I have a Khadas tone board which was ocassionally stopping working when i touched it.
(assumed that a cable was dodgy but it hasn't happened since i stopped using dodgy adapter.)
I am now wondering if it has a protection circuit in it or something.

It cost me an ssd and a torch that i was charging via pc usb when i plugged in this adapter.
Plus LOADS of time.
I hope it hasn't caused any other issues in laptop, pc or pi that i plugged it into.
I wish I had twigged the connection much earlier.
A faulty adapter cable didn't even trigger in my mind.
I can't recall if there were any other things at the time now.
Edit: Oh, it popped a small spdif out card as well.

Pretty disappointed generally.
Thanks again for your help.
 
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