I made a DVD iso of Fedora Core 1 using isos for disc1-disc6 (all md5s were good), and then used implantisomd5 to implant the md5 on the DVD iso, and then checked it using checkisomd5. This was all done on a RH9 box. So far, so good. I then burned the iso to a DVD-R(W) using: dvdrecord -dao -pad driveropts=burnfree dvd.iso and verified the md5sum of the written disc by getting the number of blocks from isoinfo, and piping dd to md5sum for the correct number of blocks and blocksize. The md5 sum of the burned DVD matches that of the iso file. This is the same way I burn Fedora/RedHat CDs, and have never had a problem with media checks. For some reason I can't get the DVD media check to work, despite the fact that the install works fine. I've tried burning without the -pad option as well without success. Any ideas? Also, the installer popped up a dialog telling me I would need discs 1-3 during the install, despite the fact that the fourth line of the .discinfo file says 1,2,3,4,5,6. RH9 never did this. Should I bugzilla it? Cheers, Eric