Interesting reading. I've seen the article before. There are valid points but I do t agree with the conclusion. Especially for Bulk Storage, considering the size of drives now , it makes no sense to waste 50%. It's not being greedy. It's being prudent.Just want to mention ...
ZFS: You should use mirror vdevs, not RAIDZ. – JRS Systems: the blog
Something I recommend to read.
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As in the case of the OP, With 10 TB drives primarily being used for media storage at $320 a pop, it makes no sense to build a 4x mirror configuration when a Raidz2 will serve perfectly well.