The only file system I've been able to get working with my A3000 is AsimCDFS. Since the only way I know to get 3,9 installed is by using my 3.1 disks, then upgrading from that to 3.9 usim AsimCDFS to read the CD.
If any of you out there are using the Casweasel IDE with an IDE hard drive and CDROM. Give me a hand too if you got CacheCDFS working.