It might have been a jukebox type system with more
traditional
 media.
 Dwight
  Subject: Re: 1Tbit 'laser optical recording
medium'
 From: paulkoning at 
comcast.net
 Date: Mon, 14 Oct 2013 14:30:40 -0400
 To: cctalk at 
classiccmp.org
 Sounds a bit like the write-once optical disk cartridge disk DEC made at one time (forgot
the model number).  But a terabit (128 GB) seems like an implausibly high storage density
for an early 1970s storage device.  That's almost 3 orders of magnitude larger than
disk drive densities of that time, not even considering the fact that it says "a
disk" while dense disk drives at the time had perhaps 10 platters.
 The obvious conclusion is {{citation needed}} .
        paul
 On Oct 14, 2013, at 1:33 PM, JP Hindin <jplist2008 at kiwigeek.com> wrote:
 While reading the wikipedia article on the ILLIAC IV there's a curious
 excerpt relating to the disk media:
 "They also provided a Burroughs B6500 mainframe to act as a front-end
 controller. Connected to the B6500 was a laser optical recording medium, a
 write-once system that stored up to 1 Tbit on a plastic disk covered with
 a thin metal film."
 Anyone know what this device was?
 Cheers;
 - JP
 Hampton, Iowa