On Mon, 17 Dec 2007, Kenneth Porter wrote: > On Monday, December 17, 2007 7:05 PM -0800 Robert Arkiletian > <robark at gmail.com> wrote: > >> Also don't forget that many mirrors offer rsync. If you rename your >> 5.0 DVD to the 5.1 version and do an rsync it will save lots of >> bandwidth. > > That surprises me. Won't similar RPM's in the two images likely be at > different offsets in the iso? Can rsync deal with that? I didn't realize it > could handle shifted differences. Rsync has no concept of the contents of files within an iso. It only knows about blocks of data. Rsync is real good at fixing/updating iso's. It will only transfer the blocks of data that have changed. Typically you get a large bandwidth savings when using a previous iso as a seed. Just make sure you get the name correct AND you do not abort the download midstream. If you abort the download midstream rsync will delete your seed iso and leave you with whatever it has succeeded in downloading and running a checksum against. If you are really curious about all of this magic have a look here: http://rsync.samba.org/how-rsync-works.html Most people do not realize just how cool rsync is. Hope this helps. Regards, -- Tom Diehl tdiehl at rogueind.com Spamtrap address mtd123 at rogueind.com