Store each vnode data on a different disk?

[ksonbol]

By default, all Distem vnode data and configuration are stored in /tmp/distem on the main disk, which makes the vnodes compete for disk read/write. Since vnodes in my experiment will each use the disk, I was wondering if there is a way to isolate the vnodes disks.
Assuming the physical node has multiple disks, and that we format them, create a partition, and mount them, I thought I found a way to do this:

if I set the "path" parameter in the "vfilesystem" hash to a different mount point for each vnode on the same pnode host:

path [r]: The path to the unique directory used to store this virtual node files

I tried it but it seemed to ignore the parameter completely and just used the default:

"/tmp/distem/rootfs-unique" + node name

Update: I realize now this is a read-only parameter. Would it be possible to use different disks if you could make this parameter writeable?

Thanks!