You have discovered that SCSI cable quality is almost as critical as SCSI termination along with termination types such as Active and Passive.
It became clear that each device in a SCSI chain needs its own identification and that any ID may have many LUN's associated with it.
The various cable distance limitations have been explained.
It became clear that while the DB-25 is not an official connector, it has been widely used and that gives an opening for destroying a parallel-based printer.
The differences between fast and wide SCSI, as well as the various flavors of Ultra SCSI have been explained. Finally, you saw the dangers of mixing SCSI and differential SCSI and the symbols that warn of the two types.
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