If anybody else has this issue, I received a PM with the solution.  The drives must be resized between deploying the OVF template and doing the initial command line configuration.  Any drive resizes after the initial command line configuration will not propagate over to OneFS, even if you expand the partitions via the command line.
Right now, I have a copy of OneFS version 8.2.0.0, installed on vSphere on a 1.5TB ESXi drive.  I have a single node, and want to perform some archive/restore tests with it.  However, the 18.7 GB provided by default by the node is too little for my data set.  How can I increase the space on the node? I've tried a few things:  I've increased the size of the data drives in vSphere, and then used the "gpart resize" command to use that space on the Isilon node.  The partitions of the six data drives on the node expand, but this is not shown in the OneFS GUI, and it's still showing 18.7GB.  I've tried using "growfs", but that hasn't worked.  Finally, I've tried re-adding the drive using "isi devices drive add", but that hasn't increase the space recognized. What can I do to get OneFS to see the additional space on the data drive partitions? Thank you.
Resizing OneFS node in vSphere