Feeds

Hitachi Maxell demos 50TB capacity LTO-class tape

Perpendicular magnetic recording comes to tape

Beginner's guide to SSL certificates

Hitachi Maxell has demonstrated a 50TB capacity LTO-class tape using perpendicular magnetic recording technology.

This is 400 per cent more than the raw capacity of the highest-capacity tape on the LTO roadmap, the 12.8TB LTO-8.

Hard disk drives have used perpendicular magnetic recording for some years and its limitations are now forecast to cause a transition to bit-patterned media or heat-assisted magnetic recording in a few years time.

The demonstration was a joint one by Hitachi Maxell and The Tokyo Institute of Technology. Hitachi Maxell says the current method of coating a tape's base layer with powdered magnetic grains faces difficulties in getting down to 10nm or less grain diameter, whereas that is possible using a "Facing Targets Sputtering" technology from the Tokyo Institute.

Hitachi Maxell sputtering method

What happens in a sputtering process is that atoms are ejected from a solid material and form a thin film on the surface of a substrate.

We're told that this sputtering is done "at room temperature without a substrate cooling system. Fine composite films, which couldn’t be prepared by previously used magnetron sputtering methods, can be formed by facing targets sputtering, thanks to damage-less formation of films on a very thin plastic film with separated plasma from the film."

The tape was given a low-noise, laminated soft magnetic underlayer. The recording layer was then sputtered onto that to create a linear formatted perpendicular magnetic recording medium, a super-high density, nanometer-sized magnetic film with an areal density of up to 45Gbit/sq in. Applying this density to an LTO-5 size tape, in terms of width and length, results in a greater than 50TB capacity.

That capacity is 33 times greater than the raw capacity of LTO-5 tape, 1.4TB.

The total thickness of the recording layer, protective layer and underlayers is about 100nm.

The facing targets sputtering method was developed by associate professor Shigeki Nakagawa et al in the department of physical electronics, part of the graduate school of engineering at the Tokyo Institute.

What this means is that, in theory, the way is clear to use current physical-size LTO tape reels, and hence cartridges, as the LTO roadmap progresses. At some point there will likely be a switch from coated media to perpendicularly recorded media and at that point backwards compatibility, a feature of LTO technology, will be tested, as the drive heads will have to be able to read both types of media for backwards compatibility to work. ®

Top 5 reasons to deploy VMware with Tegile

More from The Register

next story
IT crisis looming: 'What if AWS goes pop, runs out of cash?'
Public IaaS... something's gotta give - and it may be AWS
Linux? Bah! Red Hat has its eye on the CLOUD – and it wants to own it
CEO says it will be 'undisputed leader' in enterprise cloud tech
Oracle SHELLSHOCKER - data titan lists unpatchables
Database kingpin lists 32 products that can't be patched (yet) as GNU fixes second vuln
Ello? ello? ello?: Facebook challenger in DDoS KNOCKOUT
Gets back up again after half an hour though
Hey, what's a STORAGE company doing working on Internet-of-Cars?
Boo - it's not a terabyte car, it's just predictive maintenance and that
Troll hunter Rackspace turns Rotatable's bizarro patent to stone
News of the Weird: Screen-rotating technology declared unpatentable
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
Intelligent flash storage arrays
Tegile Intelligent Storage Arrays with IntelliFlash helps IT boost storage utilization and effciency while delivering unmatched storage savings and performance.
Beginner's guide to SSL certificates
De-mystify the technology involved and give you the information you need to make the best decision when considering your online security options.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
Secure remote control for conventional and virtual desktops
Balancing user privacy and privileged access, in accordance with compliance frameworks and legislation. Evaluating any potential remote control choice.