Anyone else noticed the bug in ethminer generating DAG files? When trying to generate DAG file for any block larger than 3870000, it will only produce a 0-size file.
Try this:
ethminer.exe -D 3870000
It will run just of a few seconds, generate 0-bytes file "full-R23-3868abc5dcee2334" and exit.
This has now been
fixed by Ethereum core devs. @Genoil or whoever is still maintaining various ethminer forks:
make sure to include this patch, or else ethminers will simply "die" after block block 3870000.
Good catch! Thanks for bringing it up, there's still some time for miner devs to get the fix in.