I'm using a modem and trying to check out some CVS projects. When svn fails I can just cd into the directory and type "svn up" and it picks right up where it left off. When I do this with cvs, it only updates successfully-downloaded files. Trying to issue the same checkout command from the same working directory as the first time results in EXTREME SLOWNESS as cvs tells me to move aside existing files. How do I resume a cvs checkout in a reasonable fashion? Do I really have to start all over? Because some projects are literally impossible for me to download in a single pass.