December 13, 201312 yr Hello, I am running Unraid 5.0. I was in the process of upgrading my drives to 4TB drive. I replace the parity drive and then checked parity. No problem. I swapped another drive 2TB to 4TB, it rebuilt, still no problem. I then went to change another drive. When I spun up the machine, the parity drive was missing. It was not even on the list to be assigned. So I precleared another new 4TB drive, added it as parity and then let it resync parity. I gave the machine a reboot after it finished and it came up with parity unassigned. I went to the dropdown and it was listed, so I chose it as the parity drive again, as the page refreshed upon assigning the drive, it vanished completeley again. Don't really know what to do next as now I have no protection and it seems I am unable to get the parity drive to stay working. These are Segate 4TB NAS drives ST4000VN000 Any help would be great! Thanks!
December 13, 201312 yr His sounds like a hardware issue rather than an unRAID specific one. The obvious candidates for problems are the SATA or power cabling. Having said that have the 4TB drives been put through the pre-clear process to ensure that you have got an early-life failure on the new drives.
December 13, 201312 yr Author Yes, I have precleared them on another machine setup just for that purpose. I have checked all the cables and connections. I am leaning towards the mother board right now as both the parity drive and the second drive which I attempted to add were both using sata on the mother board while the first data drive I replaced was on a SATA card. What are your thoughts on that theory??
December 13, 201312 yr Author OK, I have swapped the internal connections so to have the parity drive and the ones that will be replaced all on the SATA card and not connected to the motherboard directly. I am currently resyncing parity, so at least it found the drive now. We'll see how it goes after sync is done... in 2547 minutes!
December 13, 201312 yr thats almost 43 hours, NOT right at all. par sync should be less than half that.
December 13, 201312 yr had similar issues with unraid 5 4tb parity drive as best I can tell my motherboard chipset does not like this drive, a quick reorder of drive assignments and putting the 4tb parity onto one of my add in PCI cards and all is fine drive is a WD RED if that makes any difference
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