Hi Bruce,
Assumed as info pack initialization.
Re-init won't delete any data. It just set new delta pointer as per the needs.
In case if you need to delete whole data from target and again reload then Using SE14, you can Delete all Cube/DSO tables data. but its time consuming one.Lets try to delete dso/cubes data thru programs/process chains
Seek basis team help they can clear whole DB data.
Later you can do the reinit(before doing, please check and delete old init if exists) your loads and load the data.
in case of LO Data sources, before the load we need to delete and refill the setup tables.
Not sure what you need to do, can you explain your needs in detailed level so that we can suggest right approaches to full fill your needs.
Thanks