I need some advice on configuring ZFS. Here is what I have:

Physical Disks:

• 4x 3 TB
• 2x 2 TB
• 2x 1 TB

What is the best configuration for my Vdevs and storage pool. I want to maximaze space but still maintain redundancy.

Should I just get 2 more 3TB's and just create 2x 3-3TB raid2z storage pools? Create a 1x 4-3TB raidz2 vdev?

Can I put redundancy at the pool level and create individual vdevs for each drive and then add 2x 1TB+2TB striped vdevs to keep all vdevs the same size.

Keep in mind I do need to migrate data from the smaller drives and am planning on adding more 3tb drives later on.

What do you think?