If you aren't already aware of the excellent RaSCSI device, here is a description from the wiki:
github.com/akuker/RASCSI/wikiRaSCSI is a virtual SCSI device emulator that runs on a Raspberry Pi. It is a two piece solution, with a hardware and software component. RaSCSI can emulate multiple SCSI devices concurrently, provides a control interface to attach / detach drives, as well as insert and eject removable media. Simply connect the RaSCSI interface board to your system, launch the RaSCSI software on the Raspberry Pi, and the virtual devices will be accessible as physical SCSI devices!
We really need more Atari testing on the RaSCSI. So if anyone here has a SCSI enabled Atari and find the hardware interesting, please get yourself a unit and do some testing. Feel free to join the Discord community.
I am currently trying to get the Daynaport (internet over scsi) emulation to work on Atari, but at the moment I'm the only person doing this and I really would appreciate others trying it too. I have a Github issue open where me and Uwe Siemet are trying to figure it out: https://github.com/akuker/RASCSI/issues/279