Wierd HDD issue

[ttippl]

Hi guys,

First of all I am sorry for my English, I am from Czech Rep. so I am hopping that you will understand what I am trying to say

I have interesting HDD issue. I have my server running with 3x 4TB disks on raid5 in one pool. The server is running almost 2 years without problem, but couple days ago one of my disks "failed". TrueNas is showing me, that the 3rd disk is removed. I was thinking that disk is dead, but I was not sure so I tried swap disks and interestingly "failed" disk is running now, but the otherone is failed. I tried this with all disks and every time was failed (removed) different disk on the same (sata)position. So I was thinking that there is no problem with disk but it's broken cable, so I tried change the cable, but nothing. I was thinking "ok, there will be bad sata connector" so I tried use different sata connector (all of them) but still nothing. The 3rd disk is still "removed" and I don't know what to do. Is it possible, that I have broken Motherboard?

 

[jgreco]

Have you checked the power?

 

[ttippl]

Have you checked the power?

Yes. I also swap sata power cables for all disks. And yesterday i bough Backplane for 5.25" slots so now I am powering everything from molex to Backplane, but still 3rd disk not working.