Ubuntu Installation :: Installation Migration Attempt Gone Wrong

I installed Ubuntu 10.04 (32 bit version) a few months ago on a system with two IDE drives (cable select configuration). The primary drive (/dev/sda) is 40GB and the secondary drive (/dev/sdb) is 80GB. I created all of my partitions on the primary drive and left the secondary drive unconfigured. After a month or so I noticed that two of my partitions had quickly reached 50% capacity, as I had just taken a guess at an appropriate partition size when I first installed Ubuntu.

Since I had a larger unused drive already in place, I decided to migrate my installation from the smaller drive to the larger drive, but sizing the partitions in question more appropriately (i.e., much larger). I assumed that I could install Ubuntu on the bigger drive with larger partitions, byte-for-byte copy all my existing partitions from the old disk to the new one, edit /etc/fstab, reboot, and GBTW. Naturally that didn't work as I expected.

Here's what I did: Carefully logged my existing partitions on /dev/sda and their mount points Used a live CD to install the same version of Ubuntu on the larger drive (/dev/sdb), using its partition tool to generously size my partitions. I carefully logged the new partitions and their mount points. For each partition on /dev/sda (except for /boot and swap), I used dd to create a gzip'd image and stored all of those images on a backup drive.

I then used dd to complete the task of migrating all of these partitions (again, all but /boot and swap) to their respective partitions on /dev/sdb.

Ran blkid to see all of my partitions. I noticed that some of the UUIDs existed on both drives. I thought "hmmm...that's weird" and moved on.

Mounted my new root partition (/dev/sdb6) on a contrived mount point.

Edited /etc/fstab (after backing it up) and carefully replaced all the old UUIDs with their respective counterparts on my new drive. Also replaced the device reference for /boot with its respective counterpart.
Crossed fingers. Rebooted. Got some warnings about missing UUIDs.

After the system completely booted, I used the graphical disk utility and saw that the system mounted some partitions from /dev/sda and others from /dev/sdb. Not good.

Here are the steps I took since lurking here:

It seems my installation still has an identity crisis. What steps should I take from here to force my Ubuntu installation to only use my partitions on /dev/sdb?

Was there an easier way for me to migrate my installation to a new drive?