Need help with while loop and shift registers

[Evilduck]

I have a large data set and need to read in the data at maybe 200 samples at a time, process these samples through my VI, and have it append and concatenate a separate lvm file.  The part where I am confused is the shift registers. How do I limit the number of samples read in an iteration? How do I get the while loop to stop when all the data are read in?

I've attached my diagram, maybe there is something wrong with my technique?

[NIquist · Accepted solution]

This will give you an idea.  There are plenty of other (probably more efficient) methods.  This is a basic, quick and dirty solution to help you grasp the overall concept.