I can confirm the problem with natty alternate i386 cd on CD-R using a Plextor PX-800 as first IDE device (and a md software RAID on SATA HD's).
Burning the ISO on a CD-RW instead of a CD-R did help. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/360460 Title: Alternate install fails requesting same disc -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs