I know what you did, HughDaniel: You tried to partition your drive by not only making their mount points high-level directories but also mounting other partitions as their subdirectories (also known as tree-partitioning). Ubiquity cannot handle this, and so the "OSError" will result.
I know what you did, HughDaniel: You tried to partition your drive by not only making their mount points high-level directories but also mounting other partitions as their subdirectories (also known as tree-partitioning). Ubiquity cannot handle this, and so the "OSError" will result.