I've got a reasonably equipped A2000 (classic GVP Combo 030@50, Toaster, MegaChip) that I've recently done some restoration work on. I've got a ZuluSCSI recently added to it, along with the spiffy 3.2.2 ROM-but, I am bumping into the limits of the GVP's unique ASIC design and FW that makes it difficult to squeeze large partitions out of.
Doing some research on this issue has led me to find "GuruSCSI" (omniscsi.device) ROM+adapter that is the ideal fix for this card, enabling 64bit addressing and breaking through the 4gb barrier.
Learn more here: http://babel.de/amiga.html
Unfortunately, the creator/maintainer of this has made the decision to not leave a lot of breadcrumbs for reproductions. There seems to be some personality dynamics at play that make put this solution into a black box. However, it seems like at least two folks have produced and sold limited quantities of these boards in recent years. All of these folks appear to have dropped off the map.
Looking at the pics of the adapter board, it appears to be incredibly simple-I'd even attempt to KiCAD it myself if I had a enough information. But, I don't.
Anyone know more about this?