... now, finally, with more 64-bit-ness!
From Ted:
I've made the first WIP release of e2fsprogs 1.42. The primary purpose is for people to test the 64-bit functionality and be confident that we didn't introduce any 32-bit regressions.
So in theory you can at least mfks & mount a 16T fs and beyond, if you'd like to test that.
There was also enough surgery that testing it against older, smaller filesystems is welcomed too.
Thanks, -Eric