arecord from media-sound/alsa-utils isn't able to record more than 2 GB to a file, even if the file system supports it. Please see http://www.mail-archive.com/alsa-devel@lists.sourceforge.net/msg08855.html for how to fix this. Reproducible: Always Steps to Reproduce:
(I'm using a 32 bit x86 system.)
Please use the URL function next time. This in portage, thanks :)