mjhjmtu

I want to create a union of two directories and when I move a file within the union'd folder, I want it to stay on the folder it originates from(See below).

How would I accomplish this? I have tried unionfs, but it will always follow the folder order, for example, if I mount a RW folder in the first spot, all writes will go to that folder, I want the following behavior, as described below:

I want to have 2 RW folders and a union-ed folder

RW - driveA
RW - driveB
Unioned - mergeDrive

Basically, when I do a file move (I can only touch the files through the mergeDrive, I want each file to be moved within there own folder.

So for example,

mv /mnt/mergeDrive/subFolderA/fileA.csv /mnt/mergeDrive/subFolderB/fileA.csv

FileA's original path:

/mnt/driveA/subFolderA/fileA.csv

Expected path after move:

/mnt/driveA/subFolderB/fileA.csv

Then I want to be able to do:

mv /mnt/mergeDrive/subFolderA/fileB.csv /mnt/mergeDrive/subFolderB/fileB.csv

FileB's original path:

/mnt/driveB/subFolderA/fileB.csv

Expected path after move:

/mnt/driveB/subFolderB/fileB.csv

So where ever the root folder of the file originates from, it stays in that root folder when being moved, even though it is moved through /mergeDrive/. Can you setup unionfs(or something similar) to do this?