Hitachi-LG Data Storage (HLDS), a joint venture between Hitachi and LG, is a manufacturer of DVD and Blu-raydisk drives for desktop and notebook computers. Founded in late 2000, the company began operation in January 2001, and shipped its first product, the HL-DT-ST GCC-4120B combo drive, in the summer of that year. In 2006, HLDS began developing Blu-ray Disc drives. The company claims that it has led the disk drive industry in market share since its founding, with a 20% share for fiscal year 2001, and 29% for fiscal year 2012.
HLDS drives identify themselves to the computer in which they are installed as "HL-DT-ST" - Hitachi-LG Data Storage - followed by its actual model number.