Is there a way to find out which
blk*.dat file contains a particular block?
For example, it would be useful to know which
*.dat file contains block
478558, which is the point where
BCH forked from
BTC. As both share all the prior blocks, when running the forked node, it would save a lot of bandwith to just copy the block files from BTC to the BCH data directory and reindex them (with the
-reindex option), rather than having to re-download them all over again.