I have the controller for this if anyone needs one. C On 2/12/2021 11:19 AM, Al Kossow via cctalk wrote: > > This is a mystery. > What DEC system used a CDC Sentinel DC300 cartridge tape drive? > > https://www.ebay.com/itm/Vintage-Computer-DEC-BY5A5-E-Tape-Drive-77-014320/313416738022 > >