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Copying data from recorders at PV to Bonn correlator
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1) on frontend open tunnel (e.g. to recorder2)
tunnel-pv-recorder2

2) copy files
scp -P 2222 localhost:/path_on_recorder2 local_patho

Tunnels exist for all four recorders with different local ports
tunnel-pv-recorder1	2221
tunnel-pv-recorder2	2222
tunnel-pv-recorder3	2223
tunnel-pv-recorder4	2224