An analysis of file R6_70 can be found at https://elog.ph.ed.ac.uk/DESPEC/177 attachment 19
We observe c. 80M ADC data items per 2Gb file and c. 160M info code 4 & 5 data items.

This am NH switched NewMerger for a new version which minimises the number of info code 4 & 5
data items. The analysis of one of these data files (R7_20) is appended - attachment 1. We
observe c. 2M ADC data items per 2Gb file. The number of info code 4 data items is significantly
reduced as expected but info code 5 data items are not observed.

Info code 4 & 5 data items will increment every (2^28 * 1e-9) 0.268s and (2^48 * 1e-9) 3.26d.

If we examine the verbose output (attachment 2) we observe that each data block only contains
c. 60 ADC data items - a small fraction of the capacity of each data block.