Feeds

TDK cracks 200GB Blu-ray Disc problem

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

Gartner critical capabilities for enterprise endpoint backup

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. ®

Next gen security for virtualised datacentres

More from The Register

next story
Reg man looks through a Glass, darkly: Google's toy ploy or killer tech specs?
Tip: Put the shades on and you'll look less of a spanner
So, Apple won't sell cheap kit? Prepare the iOS garden wall WRECKING BALL
It can throw the low cost race if it looks to the cloud
Apple promises to lift Curse of the Drained iPhone 5 Battery
Have you tried turning it off and...? Never mind, here's a replacement
Now that's FIRE WIRE: HP recalls 6 MILLION burn-risk laptop cables
Right in the middle of Burning Mains Man week
One step closer to ROBOT BUTLERS: Dyson flashes vid of VACUUM SUCKER bot
Latest cleaner available for world+dog in September
Apple's iWatch? They cannae do it ... they don't have the POWER
Analyst predicts fanbois will have to wait until next year
HUGE iPAD? Maybe. HUGE ADVERTS? That's for SURE
Noo! Hand not big enough! Don't look at meee!
Samsung Gear S: Quick, LAUNCH IT – before Apple straps on iWatch
Full specs for wrist-mounted device here ... but who'll buy it?
AMD unveils 'single purpose' graphics card for PC gamers and NO ONE else
Chip maker claims the Radeon R9 285 is 'best in its class'
prev story

Whitepapers

Best practices for enterprise data
Discussing how technology providers have innovated in order to solve new challenges, creating a new framework for enterprise data.
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.
Advanced data protection for your virtualized environments
Find a natural fit for optimizing protection for the often resource-constrained data protection process found in virtual environments.
How modern custom applications can spur business growth
Learn how to create, deploy and manage custom applications without consuming or expanding the need for scarce, expensive IT resources.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?