MSA2060 optimal Configuration of Diskgroups

Hello everyone,

I have a question about the MSA2060 optimal DiskGroup config for SMA-DP+ Raid.

HW Config: 60 HDD of 14TB (1 Controller-Shell an 4 Disk-Shelfs)

- Addon for 2 Disk-Shelfs in the future for growing capacity

We wll use a Dual Controller with 2 Pools.:

What it better per Pool:

1 DiskGroup with 30 Disks or 2 DiskGroups with 15 Disks.

If I understand it correct the 2 DiskGroups with 15 Disks  the netto ratio will be better than 1 DG with 30 Disks.

Thank you very much for your advise.