May 6, 20242 yr Hello Unraid Community, I'm currently planning a setup using ZFS on Unraid and would appreciate some expert advice. Here are the details of my proposed hardware configuration: Drives: 4 x 2TB NVME drives Proposed Pool Layout: 3 x NVME drives in a RAIDZ1 configuration Cache: 1 x NVME drive Array: A single 32GB thumb drive I'm also considering upgrading these drives to 4TB NVMEs in the future. Given this setup, I have a few questions: Is a cache drive necessary, given that it's the same specification as the pool drives? Could I potentially configure all four drives into a single RAIDZ1 pool instead? Regarding future upgrades to 4TB drives: How complex is the process? Previously, I used TrueNAS Scale with HDDs in a similar configuration (3 drive RAIDZ1 pool upgraded from 6TB to 12TB drives by replacing each drive one by one). However, after upgrading, the pool size didn't increase until I destroyed and recreated the pool. Would I face the same issue in Unraid? Thank you for your insights and advice. Regards,
May 6, 20242 yr Community Expert 25 minutes ago, donglobal said: Is a cache drive necessary, given that it's the same specification as the pool drives? Only if you think you need it for something else, it won't act as cache for the pool. 25 minutes ago, donglobal said: Could I potentially configure all four drives into a single RAIDZ1 pool instead? Yes, and probably the best if you only need one pool. 26 minutes ago, donglobal said: Would I face the same issue in Unraid? The pool will expand automatically after all devices are replaced
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