From the Blog:
“Today IBM is unveiling a new milestone bringing to light work more than 15 years in the making between IBM researchers and Fujifilm. Together, we have set yet another new world record in tape storage – our sixth since 2006. Pushing the limits, we achieved 317 GB/in2 (gigabits per square inch) in areal density on a prototype strontium ferrite (SrFe) particulate magnetic tape developed by Fujifilm. This is approximately 27 times more than the areal density used in current state-of-the-art commercial tape drives.”
https://www.ibm.com/blogs/research/2020/12/tape-density-record/
Econophysics2020 