So I just built a backup server with an Antec HCG-520M 520w PSU and one of my 3tb WD green drives started producing a ton of write errors. I had 8 drives hooked up at the time and so I pulled the drive that was producing errors and unRAID was fine. I placed the drive that was producing the errors into my main PC and ran Seagate Tools drive check tools on it and it passed all checks. I am currently running PassMark Home on the drive with an extended test and so far it is also good.

I checked cables on the drives, I have a Supermicro drive cage and Supermicro AOC-SAS2LP-MV8 card which seems to be working fine without the 3 tb drive.

 

Weird that the drive seems to be passing all the tests I have ran in my main PC. I also tried swapping the drive onto a different Sata cable and even onto the onboard SATA controller and so I am wondering if this is a PSU issue.

 

The Antec NEO ECO 520C 520W which I would think is a very similar PSU (both single rail and bronze certified)  is listed in the PSU Hardware thread as being able to support 18 green drives and recommended for 10 - 15 drives, I would think 8 drives would not push it at all?? All the drives are either Western Digital Green drives (4tb except for the 3tb that is giving errors) and Hitachi 4tb Coolspin drives.

 

Thanks for any help

As an update, I pulled the 3tb drive from the system, everything works fine. I also pulled another drive and added the 3tb drive back in and the system again had issues, at one point the whole system powered down. I believe from this that it isn't PSU related as the removal of the other drive would have dropped the power consumption to similar levels as when I had the 3tb removed with all other drives installed.

 

I am now going to try a different 3tb Seagate drive in the system instead of the WD 3tb Green drive and see if it works.

 

Has anyone seen a compatibility with unRAID and WD 3tb green drives? 

One possibility is the SATA controller.  Some motherboards have two controllers to get to the 6 or more SATA ports.  You might try connecting the glitchy drive to another SATA port, especially if you can map the ports to different controllers.

 

Re-reading your post I notice that you have a Supermicro AOC-SAS2LP-MV8 card.  So perhaps try connecting the drive to the motherboard?  Also did this configuration work with a different PSU?

 

Edit to add: It also occurs to me that something as simple as the power connector or data cable can be the problem.  Gremlins like this are occasionally due to a flaky item that only manifests when connected to an out of spec part but otherwise seems OK.

Unfortunately I have tried all of the above, both moving it between different cables, controllers and even physically within the case

 

I wish I had something useful to offer.  I don't have any experience with that PSU and my only 3 TB WD drives are red.  I unfortunately do have some experience troubleshooting flaky PSU issues because I used to buy cheap PSUs.

Once my other server is done pre-clearing a drive that is being added, I think I will try the drive in that machine. It has a Corsair 650w psu and so we will see if that machine also has issues with that drive.