Subject:   -34- Why can't I write a tape on my DEC DAT drive and read it
                on my SGI?
Date: 03 Dec 1994 00:00:01 EST

  DEC DAT drives use hardware compression by default, and SGI DAT drives
  can't handle that. Turn it off.

  Furthermore, some SGI DAT drives hang when trying to read a hardware-
  compressed tape, instead of saying "incompatible media" as they
  should.  This is fixed in recent firmware; call SGI for an upgrade.