I am happy that worked for you but there is a huge difference between a 24 x 4tb pool and a single 2tb drive. 2tb is not a lot of data you would need to fill t

I am happy that worked for you but there is a huge difference between a 24 x 4tb pool and a single 2tb drive. 2tb is not a lot of data you would need to fill the drive 4 times a day before you would get close to hitting the single bit error rate, a pool of my size is guaranteed to hit that error rate just because of the volume of data. If we are talking about running zfs on a desktop then yea you are right you don't need ECC, but if you are running a storage server for data you want to keep then you absolutely do.