Subject:   -43- Why do SGI SCSI controllers have host ID 0 instead of
                the usual 7?
Date: 24 Feb 1994 00:00:01 EST

  It's a controller chip default. It was left alone because it doesn't
  matter much: host ID doesn't affect throughput, except perhaps on a
  horrendously overloaded bus. However, drives whose ID is set by
  jumpers are usually shipped with ID 7 (all three jumpers on), so you
  can just plug one in to an ID 0 host.