6.32.18 is where 146 support was added in. The latest Flare rev I'm aware of for that box is 6.32.20.
Still, you have a version that supports the drive so, you should be able to just pop it in and the clariion will format it (or should) automatically. I have taken 512 formatted disks and put them into a clariion before with no trouble. the box took care of the format. It may be that not all 146 gb disks are supported. Seagate is most prevalent. May even be a disk code issue.