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posted by martyb on Saturday November 10 2018, @09:34PM   Printer-friendly
from the Better-than-NAND? dept.

Sony Releases Quad-Layer 128 GB BD-R XL Media

Sony is about to start selling the industry's first 128 GB write-once BD-R XL optical media. The discs will also be the first quad-layer BDXL media formally aimed at consumers, but bringing benefits to professionals that use BDXL today.

Although the general BDXL specifications were announced back in 2010 for multi-layered write-once discs with 25 GB and 33.4 GB layers, only triple-layer BDXL discs with a 100 GB capacity (generally aimed at broadcasting, medical, and document imaging industries) have been made available so far. By contrast, quad-layer 128 GB media has never seen the light of day until now.

As it turns out, increasing the per-layer capacity of Blu-ray discs (BDs) to 33.4 GB via a technology called MLSE (Maximum Likelihood Sequence Estimation) was not a big problem, and most of today's BD players and optical drives support the BDXL standard. However, increasing the layer count to four while ensuring a broad compatibility, signal quality across four layers, yields, and some other factors slow downed release of 128 GB BDXL essentially by eight years.

Related: Ultra HD Blu-Ray Specification Completed


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  • (Score: 1, Flamebait) by MichaelDavidCrawford on Sunday November 11 2018, @01:47AM (3 children)

    by MichaelDavidCrawford (2339) Subscriber Badge <mdcrawford@gmail.com> on Sunday November 11 2018, @01:47AM (#760544) Homepage Journal

    -l to TPB.

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  • (Score: 2) by takyon on Sunday November 11 2018, @12:36PM (2 children)

    by takyon (881) <reversethis-{gro ... s} {ta} {noykat}> on Sunday November 11 2018, @12:36PM (#760626) Journal

    Nice modding.

    https://old.reddit.com/r/opendirectories/ [reddit.com]

    Normies have trouble filling 1 terabyte. I'm sure I could fill 100 terabytes if I set my mind to it. That would take at least 13 weeks at an average rate of 100 Mbps, or less than a week and a half at 1 Gbps.

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    • (Score: 0) by Anonymous Coward on Sunday November 11 2018, @05:18PM

      by Anonymous Coward on Sunday November 11 2018, @05:18PM (#760660)

      Normies have trouble filling 1 terabyte.

      It would surprise you...

      I once had a conversation with a taxi driver who had 2.5 TB of music, 4TB of video and something approaching 1TB of a mix of games ROMs and comics on his home NAS boxes, and this was over a year ago now.

      Puts my 2TB ZFS box to shame, though at least I can back up the contents of my server to a single portable HD, which are thankfully getting cheaper making multiple offline backups more economically viable.

      (oh, and thanks for that link, I've never been a reddit fan so would never have come across this in the normal course of things..)

    • (Score: 0) by Anonymous Coward on Sunday November 11 2018, @11:23PM

      by Anonymous Coward on Sunday November 11 2018, @11:23PM (#760734)

      I have trouble filling 256GB. All of my important data is text (configurations, scripts, sources built up over the years). My music collection takes up the most space, but that only grows a few gigs a year at max, and I end up deleting at least half of it over time anyway.