The situation at hand is I have a 4x2tb raid (1 brick), which i'm going to backup to a external usb enclosure (1 brick). I am hoping that GlusterFS will allow me to replicate the main brick on my raid to my external usb brick on the same node. In time I plan to migrate it to a Raspi and relocate it, but want to get familiar with how it works and have the ground work already up and running. Gluster sounds great, and i'm hoping it can do this even though all the places i've searched made it seem like there had to be multiple nodes.

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