The installer couldn't mount my hard disk filesystems, so I had to do them by hand. The root filesystem is on hda1, and most of the other filesystems are one sda1 (/usr, /usr/lib, /usr/src, /opt, and /opt). I have some additional partitions on my SCSI drive that are not currently in use, but the installer tried to mount them, and didn't like the fact they did not have any file system yet. I was running RedHat GNU/Linux 5.2 before with kernel-2.2.7 that I compiled and installed by hand, along with the requisite RPM's for the 2.2.x kernel family. I can provide a list of the before and after RPM list, the upgrade.log file, and my fstab if you'd like. I upgraded via a local CD-ROM drive (hdc), which I know from previous upgrades that I have to mention as a boot param (expert hdc=cdrom). The new system version is "Linux version 2.2.5-15 (root.redhat.com) (gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)) #1 Mon Apr 19 22:21:09 EDT 1999" I've been hacking *nix for going on 15 years, and I do sometimes working directly on admin files with command prompts or by hand. This might be the source of the problems. I did replace the fstab file with a copy without my commented out entries, but it made no difference.) I did finally get the upgrade done by mknod, fsck and mounting all the partitions by hand and skipping the "Find current installation" step. I apologize for not providing full details. Validation is my day job, and I need to get back to that rather than play around with my O/S.
*** This bug has been marked as a duplicate of 2504 ***