Hitachi Develops 200-Gbyte Holographic Disk

Hitachi intends to begin sampling a holographic disk with a 200-Gbyte capacity in Fall 2005 according to Information Week.

“The 5-inch (130 mm) disk has a holographic system that writes and reads data with a blue laser. The laser beam splits into two beams, a signal beam that convey data and a reference beam. Data to be stored is encoded into data pages, which are written in multiplex in the storage media.

The company carries a 400-Gbyte tape cartridge for computer backup, but a disk form should be available if users want to access the data, said the spokesman.”

A 400GB holographic disk could be in production by 2007.

Read more at Information Week