Editing Tape drive (section)

== Capacity ==
Manufacturers often specify the capacity of tapes using data compression techniques; compressibility varies for different data (commonly 2:1 to 8:1), and the specified capacity may not be attained for some types of real data. {{As of|2014}}, tape drives capable of higher capacity were still being developed.

In 2011, [[Fujifilm]] and [[IBM]] announced that they had been able to record 29.5 billion bits per square inch with magnetic-tape media developed using [[Barium Ferrite]] (BaFe) particles and nanotechnologies, allowing drives with true (uncompressed) tape capacity of 35&nbsp;TB.<ref>{{cite web |url=http://www.fujifilmusa.com/press/news/display_news?newsID=879807 |title=FujiFilm Barium-Ferrite Magnetic Tape Establishes World Record in Data Density: 29.5 Billion Bits per Square Inch |date=January 22, 2010|publisher=Fujifilm |access-date=2011-07-13 }}</ref><ref name="Harris">{{cite news|url=http://www.zdnet.com/blog/storage/a-70-tb-tape-cartridge-too-much-too-late/769|archive-url=https://archive.today/20130105124237/http://www.zdnet.com/blog/storage/a-70-tb-tape-cartridge-too-much-too-late/769|url-status=dead|archive-date=January 5, 2013|title=A 70&nbsp;TB tape cartridge: too much, too late? |last=Harris|first=Robin|date=January 24, 2010|work=ZDNet|access-date=2011-07-13}}</ref> The technology was not expected to be commercially available for at least a decade.

In 2014, [[Sony]] and [[IBM]] announced that they had been able to record 148 billion bits per square inch with magnetic tape media developed using a new vacuum thin-film forming technology able to form extremely fine crystal particles, allowing true tape capacity of 185&nbsp;TB.<ref>{{cite web |url=http://www.sony.net/SonyInfo/News/Press/201404/14-044E/index.html |title=Sony develops magnetic tape technology with the world's highest*1 areal recording density of 148&nbsp;Gb/in2|publisher=Sony Global |access-date=2014-05-04 }}</ref><ref name="Finags">{{cite news|url=https://www.engadget.com/2014/04/30/sony-185tb-data-tape/|title=Sony's 185TB data tape puts your hard drive to shame |last=Fingas|first=Jon|date=May 4, 2014|publisher=Engadget|access-date=2014-05-04}}</ref>

On December 15, 2020, [[Fujifilm]] and [[IBM]] announced a Strontium Ferrite (SrFe) technology able, in theory, to store 580 TB per tape cartridge.<ref>{{cite web |url=https://www.ibm.com/blogs/research/2020/12/tape-density-record/|title=Hybrid clouds will rely on magnetic tape for decades to come|author=	Mark Lantz|website=[[IBM]] }}</ref>