@ hamtronix
If the problem is with gvpscsi.device, changing your CDFS probably won't help. I stopped using Asim many years ago, but I recently reinstalled it on a secondary machine and now I'm wondering why I ever got rid of it. Its direct access to files, audio tracks, and raw blocks are a unique all-in-one feature that I believe is worth holding onto.
That being said, AmiCDFS is a freeware alternative. See Aminet.
Try upgrading gvpscsi and Asim to the latest versions before you throw in the towel.