- On PCFS:
  - Wait for a gap in recording, then
    - mk5=pointers? to identify current end byte (the last number). 
    - Calculate the start byte as end-byte - 32000000
    - mk5=disk2file=/home/oper/test_nov5_5.m5b:724613580800:724645580800:n  where the big numbers are the start and end bytes. Output file name should be unique
  - Then, on hex0:
    - scp oper@mk5ya:test_nov5_5.m5b .
    - m5spec test_nov5_5.m5b Mark5B-256-16-1 2048 1000000 test.out
    - plot_autocor.pl test.out

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