Comment 88 for bug 569900

I was able to fix this problem after the failed install and avoid the re-install. Ubuntu Server 10.10

I also have the 500GB drives with a RAID1.

My partitions were done as default with /dev/sda1 and /dev/sdb1 as the root partitions and /dev/sda5 and /dev/sdb5 as the swap partitions.

I shrunk the swap partitions (/dev/sda5 and /dev/sdb5) by 2 "Units" using fdisk and then zeroed the raid superblocks.

The steps I took.

Load up the rescue disk and mount the installer root. In my case it was seeing md5 and md5p1 as my raid devices.

1. run "mdadm --stop /dev/md5"
2. fdisk /dev/sda
3. delete partition 5 (/dev/sd5)
4. create a new logical partition 5
5. use the default start
6. used End - 2 (in my case 60802 - 2 = 60800) as the End
7. change type to "fd" for "Linux raid autodetect"
8-14. reapeat steps 2 - 7 with /dev/sdb
15. run mdadm --zero-superblock /dev/sda
16. run mdadm --zero-superblock /dev/sdb
17. reboot

After getting this to work, and realizing that a block is about 8MB, I realize this solution loses out on 16MB on my disks. I'm sure a larger end value might work as well but who cares. It boots now.