October 29, 20241 yr I have two identical drives and have been pulling my head out trying to get this sorted. What I have tried. - Several formats in xfs and zfs - Cleared Disks - HPA is disabled - Destructive Formats - Switching position of drives in parity slots - Assigning cleared drives with no file system Am I missing something here?
October 29, 20241 yr Community Expert I missed that in the screenshot you have 14TB as data and 8TB as parity, that won't work, it will need to be the other way around.
October 29, 20241 yr Author I'm new to UnRaid and testing things out at the moment during the free trial. If I remove the 14TB drives, will I be able to add the 8TB drives as parity, then add the 14TB drives back in? I know it sounds a bit weird, but I only need the 8TB for parity rather than the 14TB. Is there some way to work around that? Edited October 29, 20241 yr by Hypnosis4u2nv
October 29, 20241 yr Community Expert Any parity drives must be at least as large as the largest data drive. If you want 14TB data drives in the array then both parity drives would need to be 14TB.
October 29, 20241 yr Author Seems I misunderstood how the parity settings works on Unraid. I thought assigning two drives to parity and parity 2 would sync between the two, instead its Parity + Disk Slot. Duh. Thanks for the help.
October 29, 20241 yr Community Expert Just now, Hypnosis4u2nv said: Seems I misunderstood how the parity settings works on Unraid. I thought assigning two drives to parity and parity 2 would sync between the two When you have 2 parity disks, then different algorithms are used to calculate the contents of each one. This is a necessity to handle any 2 drives failing without data loss.
October 30, 20241 yr Community Expert You could technically HW raid the 2 8TB drives together into a single 16TB drive, then assign as a single parity disk within unraid. The parity drive size requirement of being equal or larger than your biggest array drive still remains. Have tested that with an ase 71605. Was more of a novelty than practical and I reverted back to normal singular parity siak after a few days.
October 31, 20241 yr Author Solution It's good thing that I have a few spare drives around to play with different NAS OS's to find one that works for me the best while I'm on a trial license. All my issues were user error and because I didn't understand how disks are handled in Unraid even though I did understand that parity only works with drives of the same size or larger. The biggest contributing factor was that I was totally wrong on how Unassigned disks work in the OS. I assumed that they HAD to be assigned to the array in order for me to use them. Once I figured that they didn't have to be assigned, I could use the 8TB drives in parity while also using the 14TB drives outside of the array and it wouldn't give me the issue of the biggest disk not in the parity slot.
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