IDE68k imitates the Gayle functions of an A600 so it's actually like having an A600 with IDE support on the matter.
Based on the kickstart (scsi.device) and the filesystem used you can have from 4GB cap per partition or more using and updated scsi.device and filesystem.
I don't know what SnerakNet is but since you're using an CF card, it's not so important to make any FAT32 partition as you can mount the CF to a PC using a multicard reader and access it easily via WinUAE
