Help with disk configuration

[unraid.q15ud]

I'm planning to change Synology DS 220j with 1x 4TB HDD to:

- HP 600 G3 MT, i5 6500,

- 16GB RAM,

- 3x 4TB HDD (2 new + 1 old from Synology),

- 1x 1TB SSD,

- UnRAID.

 

Action plan:

Stage 1.

I mount 2x 4TB + 1x SSD to the HP.

 

Stage 2.

I copy the data from the Synology to the HP.

 

Stage 3.

I move 1x 4TB HDD from the Synology to the HP.

 

Question:

- How do I configure the drives (parity, disk cache), in UnRAID in Stage 1?

- How to configure the target disks (parity, disk cache) in UnRAID in Stage 3?