This information gives information that is specific to the generic scsi driver.
The Generic SCSI device driver provides an interface for sending SCSI commands to all SCSI devices - disks, tapes, CDROMs, media changer robots, etc.
Everything electrically compatible with your SCSI board should work.
None :-).
SCSI generic devices use character major 21. Due to constraints imposed by Linux's use of a 16 bit dev_t, minor numbers are dynamically assigned from 0, one per device, with
/dev/sg0
corresponding to the lowest numerical target/lun on the first SCSI board.