Software RAID creates multiple partitions

[backisen]

I’ve started creating a RAID 6 pool which consist of 7 x 4 TB drives. Initially everything seems fine but after a few minutes/hour I see 3 partitions, see pic below. I’ve tried wiping all disks initially using secure wipe for a couple of minutes and the quick wipe. I’ve Al’s tried the dd command advised in another thread but the same thing happened. Everything seems to work and zfs file system can be created but not sure if this I safe to use?




Additional question: would it be better to go with RAID Z2?

Edit: meant to post this in OMV forum. Please delete.

 

[Dunuin]

It's best to not use ZFS on top of raid. See here why: https://openzfs.github.io/openzfs-docs/Performance and Tuning/Hardware.html#hardware-raid-controllers

And yes, thats normal that ZFS will create two partitions (1+9).
I don't see the point running ZFS on top of mdadm software raid. If you only care about performance use something like LVM-Thin/ext4+qcow2 on top of HW raid with BBU + cache. If you care about features + data integrity directly use a raidz2 without SW/HW raid on top.