oh, that was silly on me then. 12 then it’ll be.
About the planning I did the readings for months, and without being 100% sure went for the raidz2. The problem with the simpler mirrors is that if you get unlucky and 2 disks go away in the same vdev that is it. And mirroring in 3 ways or more is too expensive. With this, my idea was to have at least room for 2 of them to fail. anyone, and yet still be able to try resilvering. I know it will stress big time when the time comes, but it is what it is. The feeling of security I get with this,. seems better to me, but it is just me maybe. Going further on disks, equipment etc is out of reach for me too.
With the SSD addition I plain to gain just a bit of performance, maybe, but I really don’t care. The main propose here is resilience. But when I realised than setting the record size equals to special small block in a dataset for instance will make use of the SSDs only, was the plus I wanted just in case it comes handy for some documents and minor stuff in the future. I understand the risk of the metadata here too. But tried to match the same level of redundance.
Went through several good readings, among them this and this
Anyways, thanks for the clarification!