From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20030115 Description of problem: The Grub chain loader for an existing partition was corrupted by installation of the Phoebe beta, leaving the first system unusable. Situation: Existing RedHat 8.0 athlon installed on hda, /boot on hda1, / on hda2, and swap on hda3. Action: Install RedHat 8.0.93 on hdb, / on hdb1 and no separate /boot partition. Use common swap partition, and both platforms in Grub on hda MBR. RedHat 8.0 installation to be the default boot. Result: After completing the above dual-boot setup, the chain loader for the RedHat 8.0 installation is corrupt, and that system cannot be booted anymore. Version-Release number of selected component (if applicable): How reproducible: Didn't try Steps to Reproduce: 1.per outline above Actual Results: The RedHat 8.0.93 system was the only one left bootable. Existing system chain loader corrupted, per the failed boot message. Expected Results: a fully functional dual-boot setup was expected. Additional info:
To chainload, you have to have one of the copies of grub installed on a partition, not both on the MBR.