I personally wouldn’t use raidz1 because it seems too risky to me. I’d have higher redundancy.
Some links
https://www.truenas.com/community/threads/raidz1-vs-raid-5-ures.42598/
https://www.truenas.com/community/threads/5x-4tb-raidz1-array-rebuilding-with-nre-ure-issue.13719/
https://magj.github.io/raid-failure/
The last link is talking about actual raid and not zfs. But it has a 50/50 chance with a URE rate of 10^14 to lose the array. Raidz1 maybe won’t have that catastrophic of a failure, but you’d still be rolling the dice on some corruption.
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