Feeds

TDK cracks 200GB Blu-ray Disc problem

Yes, but is it really a Blu-ray Disc?

Boost IT visibility and business value

TDK has gone ahead and produced the 200GB Blu-ray Disc it announced a few weeks ago that it was working on. And while it appears to have failed to compress four standard dual-layer 50GB discs together into a single unit, it has nonetheless come up with a novel alternative.

According to a subscription-only report on Japanese-language site Techon, the 200GB BD contains six data-storage layers. Now, with a standard dual-layer BD offering 50GB of storage capacity, you might well assume that the 200GB model contains not six but eight data layers.

Providing the same capacity but with fewer layers means each layer must hold more data that a single-layer BD can. Indeed, TDK said it upped the capacity to 33GB - 32 per cent more than a standard BD data-carrying layer can. According to the report, it uses bismuth peroxide as the recording medium - heat it sufficiently with laser light and it forms bubbles of air. These reflect light differently than the surrounding material does, so can be used to record digital information in the way a CD or DVD's pits do.

That said, since the density of the bubbles is clearly different from that of a standard BD - hence the higher capacity - it's unclear whether a BD-compatible drive could actually read one of these things. And since the 200GB disc is not more part of the current Blu-ray Disc specification than this reporter is, you can argue that the 200GB disc, while technologically impressive, isn't about to allow anyone to cram the whole of the extended edition Lord of the Rings movies, extras and all, on a single, HD disc. ®

The essential guide to IT transformation

More from The Register

next story
Apple takes blade to 13-inch MacBook Pro with Retina display
Shaves price, not screen on mid-2014 model
iPhone 6 flip tip slips in Aussie's clip: Apple's 'reversible USB' leaks
New plug not compatible with official Type-C, according to fresh rumors
Top Gun display for your CAR: Heads-up fighter pilot tech
Sadly Navdy kit doesn't include Sidewinder missile to blast traffic
FEAST YOUR EYES: Samsung's Galaxy Alpha has an 'entirely new appearance'
Wow, it looks like nothing else on the market, for sure
YES YES YES! Apple patents mousy, pressure-sensing iVibrator
Fanbois prepare to experience the great Cupertin-O
Steve Jobs had BETTER BALLS than Atari, says Apple mouse designer
Xerox? Pff, not even in the same league as His Jobsiness
TV transport tech, part 1: From server to sofa at the touch of a button
You won't believe how much goes into today's telly tech
Apple analyst: fruity firm set to shift 75 million iPhones
We'll have some of whatever he's having please
Things are looking up in Flappy Bird sequel
'Swing Copters' offers the same gameplay but in a different direction
prev story

Whitepapers

Endpoint data privacy in the cloud is easier than you think
Innovations in encryption and storage resolve issues of data privacy and key requirements for companies to look for in a solution.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Solving today's distributed Big Data backup challenges
Enable IT efficiency and allow a firm to access and reuse corporate information for competitive advantage, ultimately changing business outcomes.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.