November 6, 20214 yr I'm currently debating rebuilding my existing Snapraid + MergerFS build to Unraid, but i'm very concerned with the 2 parity disk limitation. I currently have 25 storage disks with 5 parity disks. I'm considering using Unraid pools to help add parity with a setup similar to this: Pool1 8 data disks 2 parity disks Pool2 8 data disks 2 parity disks Pool3 8 data disks 2 parity disks However looking at how shares are created in Unraid it doesn't appear shares can span across multiple pools, is that correct? So a share called /storage couldn't represent data across all three pools, similar to how MergerFS is working? I'd love some additional input here from anyone doing something similar.
November 6, 20214 yr In Unraid, there is a single array, and that array can have up to 2 parity disks. You can also have multiple pools in addition to the array. The pools don't really have separate parity disks. You can have multiple disks in each pool but only if they use btrfs, and btrfs allows several raid modes. https://wiki.unraid.net/Manual/Storage_Management#Pool_Modes
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