Pfs3 8000000b

[Pat the Cat]

43.43 is bugged, unfortunately. 43.45 is good. At least according to this, good guide.

http://eab.abime.net/showthread.php?t=61666

OS 3.9 Boing Bag 2 issueScsi.device v43.43 from OS 3.9 Boing Bag 2 attempts to support 48bit LBA addressing required for drives larger than 128GiB.
Unfortunately it was not implemented correctly in v43.43, and only later fixed by Toni Wilen in v43.45.
OS3.9 BB2 uses its buggy LBA48 code with any drive above 4GiB that  reports LBA48 capability, and will guru immediately after BB2 setpatch  has rebooted the system.

The article does give details of how to use the later scsi.device, and you should find the big partition is picked up correctly after that. You MIGHT need to add a "DOWNGRADE" option to the command line that adds the later driver (because it is the same overall V number, V43). As per this rather long thread from this very forum;-

http://www.amiga.org/forums/showthread.php?t=71881

[Pat the Cat]

Apples an oranges. The A3000 has SCSI, the guide talks about IDE. There is no LBA48 issue with SCSI. The 43.45 update is for IDE only.

Seeing as OP isn't using onboard A3000 SCSI, I don't think is relevant...

Come to that, if Supra SCSI card for A2000 doesn't use scsi.device, but it's own .device, that might be where the problem lies? Using an older device driver that does not support partitions over 2GB would explain the behaviour.