This article is from the storage FAQ part1, by Rodney D. Van Meter with numerous contributions by others.
From Toshiba & BTS, originally designed as a full-speed (~150MB/sec.) digital HDTV VTR. A model with a HiPPI interface is supposed to be available end of 94. The video version is priced at US$300K+. I believe the tape transport and cartridge are the same as for D-2, though the tape material is different. (4/94, rdv)