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Toshiba spins 2.5 Tbit hard disk

August 18, 2010 // Rick Merritt

Toshiba spins 2.5 Tbit hard disk

Toshiba Corp. has successfully flown a recording head over a track on a disk that packs 2.5 Terabits of data per square inch, four times the density of today's hard disks.


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The report gives a boost to backers of bit patterned media, a technique for tightly arranging data locations on a disk seen by some as the next big leap in denser hard drives. But drive makers are still far from agreement about the road map for rotating media.

Three of the largest drive makers recently agreed to form an alliance to define an industry road map and coordinate research toward its goals. But even the members of that group say it is still unclear whether it will back patterned media or one of several approaches based on heat- or energy-assisted magnetic recording.

"In our labs, we are evaluating both and there are potential technical hurdles with both solutions, but with this development it looks like bit pattern media is a strong contender," said Maciek Brzeski, vice president of marketing for Toshiba's storage group.

Toshiba will describe it's work Wednesday (Aug. 18) in a paper at the Magnetic Recording Conference 2010 in San Diego. The company used an etching mask as a template to create a servo pattern readable by a hard drive using 17nm self-assembling polymer dots. Each dot represents a single bit of memory.

Toshiba claims it is the first time a drive maker has been able to control a head flying over a dense data track made of self assembling polymer dots. The company has yet to prove it can read and write data using the approach.

Japan's New Energy and Industrial Technology Development Organization which is sponsoring work on dense magnetic memory funded part of Toshiba's work. The drive maker has also worked closely with Japan's Storage Research Consortium. It has not yet decided whether it will join the Storage Technology Alliance formed by competitors Hitachi GST, Seagate and Western Digital.
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