On 29/11/2020 18:06, Andrew Gierth wrote:
Lester> Given the important material identified by data that is only Lester> available in the 'backward' storage
I think you're confusing 'backward' and 'backzone'; the 'backward' file contains NO data, only Link directives for obsoleted names. Actual data about zones with only pre-1970 differences from current zones is in 'backzone'.
You are quite right ... but both contain important historic information, and allowing them to be 'switched off' simply because it saves a few bytes of data misses the point that ANY of the systems on which it has been switched off may then be lying on it's displayed information rather than simply saying 'can not display'! -- Lester Caine - G8HFL ----------------------------- Contact - https://lsces.uk/wiki/Contact L.S.Caine Electronic Services - https://lsces.uk Model Engineers Digital Workshop - https://medw.uk Rainbow Digital Media - https://rainbowdigitalmedia.uk