Partition > disk-0 and disk-1

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Hi.

Sorry for my bad english... i will do my very best.
I want make a vm as samba-server. in this scenario my data in /home.

Is it useful with two virtio Disks?
virtio 0 > disk-0 > 150GB > /
virtio 1 > disk-1 > 1400GB > /home

Or is it useful with one virtio Disk?
virtio 0 > disk-0 > 1550GB > / (150GB) + /home (1400GB)

THX a lot

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