Not strictly Amiga, but this may come in handy for Amiga users, too:
[GIMONS] has built a SCSI virtual drive from a RaspberryPi board, for his vintage x68000 computer. Via a minimal SCSI interface on the RasPi's GPIO connector it can serve as a harddisc, or pretty much any other SCSI device you could imagine (MO, CDROM, Ethernet, ...).

http://hackaday.com/2017/05/01/the-raspberry-pi-becomes-a-scsi-device/

Here's the original post (in japanese):
http://www.geocities.jp/kugimoto0715/rascsi/index.html