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  1. Before I start explaining, this is what ImgBurn says while checking the disc, again:

    ++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++++++
    ASUS SBW-06D5H-U E101 (USB)
    Current Profile: BD-R

    Disc Information:
    Status: Complete
    State of Last Session: Complete
    Erasable: No
    Sessions: 1
    Sectors: 12.143.552
    Size: 24.869.994.496 bytes
    Time: 2698:36:02 (MM:SS:FF)
    MID: RITEK-BR3-000
    Supported Read Speeds: 6x
    Current Read Speed: 2,5x - 6x

    TOC Information:
    Session 1... (LBA: 0)
    -> Track 01 (Mode 1, LBA: 0 - 12143551)
    -> LeadOut (LBA: 12143552)

    Track Information:
    Session 1...
    -> Track 01 (LTSA: 0, LTS: 12143552, LRA: 12143551)

    Disc Definition Structure:
    Certified: No
    Scanned: No
    Manufacturers Name: PIONEER
    Additional ID: SBW-06D5H-U
    Serial Number: BADL255379WL

    BD Disc Information:
    Disc ID: RITEK-BR3-000
    Disc Type: BD-R
    Disc Size: 120 mm
    Disc Class: 0
    Disc Version: 1
    Disc Time Stamp: 10/2010
    Number of Layers: 1
    Layer Type: Writable
    DVD Layer Present: No
    CD Layer Present: No
    Channel Bit Length: 74.50 nm (25 GB Per Layer)
    Push-Pull Polarity: Positive
    Recorded Mark Polarity: HTL
    BCA Present: Yes
    Maximum Transfer Rate: Not Specified
    First PAA of Data Zone: 131.072
    Last PAA of Data Zone: 1.658.494

    ++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++++++

    Yesterday I burned a 25 GB BD-R filling 99% of data (24.869.928.960 bytes, total). I noticed the writing was sucessfully, but while verifying (and I do verify all discs after), ImgBurn returned the L-EC Uncorrectable Error while checking one of the files. Just one. ImgBurn continued the ckecking after that, and completed that task.

    It seems the disc was burned 100% OK, but 1 of the 249 files had the MD5 hash changed. That's right, 249 files were burned total, 248 of them repeated the same HASH compared to my SSD.

    1 didn't.

    I used a program called MD5Summer, to create hashes from all of them. From SSD and BD-R.

    After more/less 40 minutes, it did while checking this Ritek BD-R, then I repeated the same process with the folders, stored in my SSD.

    This site compared the contents of both texts:

    It told me these hashes (digital fingerprints) are different:


    d37d912a9952c34024977afce372b94f *MOVIE.mkv


    4e33f33f67936bfeddb5362bb938936c *MOVIE.mkv

    That particular MKV has 3.34 GB size, 6 subtitles, 3 audio tracks, HEVC video...

    And when I open from the BD-R, don't notice anything different (unless I need to watch 100% of the content, while also switching between tracks). But it IS different, since the hash changed.

    The question is:

    - What went wrong here, and should I assume this MKV is the same as the one stored in my SSD, despite the hash change? Or I need to do another backup from that single file?

    Another Ritek BD-R I am having a problem with. Probably that area of the disc is damaged?

    The other I had an issue spent more than 30 minutes "writing lead-in", and was stuck in that step. Do I need to discard this BD-R disc? I had to interrupt the writing, but ImgBurn says the media is empty.

    P.S. I was able to determine if the file was OK. It isn't, and I already discarded.

    - Simply copy all contents from the BD-R into your SSD, again. If it fails, it's damaged.

    All were fine, except for this affected MKV. So it's safe to assume the burning went OK 99%, except for that 1% related to that Matroska.

    Also, after carefully looking into the disc surface, I believe I noticed either a small scratch which probably account for that problem, or some sort of disc surface anomaly, likely during manufacturing. I doubt this was caused by the external drive or ImgBurn, since other discs were fine during burning and checking. Or the fact I used 99%. This isn't the first coaster I am looking at... not the 1st time it happened, sadly.
    Last edited by Perene; 4th Apr 2024 at 21:10.
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