I have a Seagate Barracuda 3TB hard disk in a FreeNAS server.
FreeNAS is reporting a SMART failure on the disk - 184 end-to-end error
At first I thought the disk was bad, however, when I take the hard drive and put it into my desktop and run an extended SeaTools test against the disk, it comes up completely clean.
I figured the problem was the computer, then, so I swapped the motherboard, power supply, SATA cables. (Actually I moved the whole system over to a new mini-itx chassis which I was planning on doing anyways). I kept the same RAM and CPU. Wiped and removed the disk from FreeNAS altogether, and then added it back.
I'm getting the same 184 end-to-end error shortly after doing this.