I've also tried to install OMV4 on pogoplug v4 and e02, both stuck on proftpd. Apparently this is a known bug, and lies with proftpd. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=870624 I'm attempting to install proftpd beforehand with the above fix, and see if it will complete this time. Update: Got OMV4 to install and running, install proftpd before hand and apply theby vampirex - Debian