Cannonical kept bragging about how they’ll improve the LiveCD Installer for 10.10, then the alternate-CD (what I use) would also have its Installer improved for 11.04, they said — so I decided to give it a try… same old CRAPWARE with few improvements. (Also needed to re-start my installation after checking out LVM then deciding it wasn’t for me; could not un-do the LVM (even after removing the Logical Volumes then the Logical Group, they RE-APPEARED in my Kubuntu Installer’s ‘proposed’ partition table!), until I re-booted & went thru all the Installer’s settings before the Disk Partitioning.)

I might switch back to Kubuntu someday but not until they make their Installer at least HALF as good as SuSE’s (especially in the complex ‘alternative CD’ partitioning).

The proper solution would be to have the installer ask if you want to install jfs_utils before trying to mount a partition it identified as “JFS”. This seems a catch-22, because installing software can not be done until partitions are finished. However, Ubuntu could accept your choice of reformatting /, reusing /home as JFS, and installing jfs_utils (later). Then, it could first format and mount /, then install the bare minimum, then mount /home, then go on with the installation.

Or the installer could simply support JFS as it does ext2/3/4.