My unraid system had a Corsair HX750 modular PSU that worked swell until (I think) I accidentally plugged in a 4-pin molex the wrong way and fried a bunch of my hard drives on the array.

 

After recovering the system, I am now slowly rebuilding (what is left of it). One of the issues I have had is with the integrity of the HX750. It was the first time I used that PSU and I wasn't sure whether I made a wrong connection or I had a defective PSU. Moreover, I wasn't sure whether the whole fiasco of frying hard drives damaged the regulators in my PSU.

 

So to be safe I ordered a Seasonic G-750 PSU to replace it, although I had no empirical evidence that the Corsair was damaged. Both are modular PSUs.

 

 

Now that I have both, I used a PSU tester to compare and they both seem to be working well as far as I can tell with the PSU tester with minimal load.

 

 

My problem is that I have a Norco 4220 chassis that has a 5 backplanes, each powering 4x hard drives. Each backplane connects to the PSU with a 4-pin Molex connector.

 

 

Ideally, to minimize overloading, I wanted to have a separate modular cable from the PSU supplying each of the 5 backplanes. However, while the Corsair has 6x Peripheral/SATA modular sockets in it, the Seasonic only has 4x. This means, to power my chassis using the Seasonic, I will need at least one modular connector split to 2x 4-pin molex, in addition to 3x direct modular cables attached to each backplane.

 

 

Do you guys think this is safe? Or should I just abandon this setup and go back to the Corsair?

 

 

I've been paranoid about this ever since my accident and I'm not sure which is the best solution. The problem with the Corsair is that although it serves my purpose, and although the PSU tester seems to suggest that it is working, I have been told that you will never know whether it was truly damaged until you test it under a full load.

 

 

Any advice?

I think it's very unlikely that you harmed the HX750, although I can appreciate your concern.

 

On the other hand, I don't think there's a problem powering 8 hard drives with a single bus line from the Seasonic, so using one splitter for that is also fine.

 

Personally, I don't think you damaged the HX750 ... it's certainly possible, but not likely, since the tester shows all good voltages.  It's true that's not a full-load test; but had you blown any of the buses, it's unlikely it would test good, even without a load.

 

I'd use the HX750 for it's ability to have a dedicated run to each of the 5 backplanes; but I'd also test each backplane with a drive you can afford to lose before plugging in your new array drives.    If you're skittish about doing that, just use the Seasonic and use a single splitter for one of the lines.