1) Deactivate the unit (set to zero LUns) in the CSPPC early boot menu
2) Boot as normal
3) Use the unitcontrol tool (or is it the scsiconfig tool - I always get the two mixed up) to activate the scsi unit previously deactivated in step 1.
4) Run HDtoolbox
5) Change the filesystem back to FFS and save changes.
6) Reboot, and use the early boot menu to reactivate the scsi unit with 1 lun.
Has worked for me in the past. :-)
Obviously, you will lose the data on the partition for which you are changing the filesystem.
