Description of problem:

When upgrading a FC6 box to FC7 with the DVD, choosing "Upgrade existing
installation" (which is correctly found with root
file system on /dev/sda3, the following error message is displayed:

Error enabling swap device hda2: No such file or directory
The /etc/fstab on your upgrade partition does not reference a valid swap partition.
Press OK to reboot your system.

My swap is not mounted using a label, ie:

/dev/hda2    swap    swap    defaults   0 0

The quick fix was to boot back into the FC6 system, and change the above entry to:

/dev/sda2    swap    swap    defaults   0 0

Then immediately boot to the DVD, and the install worked.  Seems like a beginner
user might have a tough time figuring this out.

This is similar to a bug report (Closed):
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=249392

Unlike above, this bug seems to be real, as I only have one choice for
upgrading: /dev/sda3.  Also no RAID is on this system.

Seems like an issue with the change to libata device naming.

How reproducible:
Always.

Steps to Reproduce:
1. Boot from installation DVD
2. Choose upgrade
  
Actual results:
Doesn't install.