<div dir="auto"><div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">чт, 29 дек. 2022 г., 01:53 Terje J. Hanssen <<a href="mailto:terjejhanssen@gmail.com" target="_blank" rel="noreferrer">terjejhanssen@gmail.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div>
    <br>
    <br>
    <div>Den 27.12.2022 02:17, skrev Andrew
      Randrianasulu:<br>
    </div>
    <blockquote type="cite">
      
      <div dir="auto">
        <div><br>
          <br>
          <div class="gmail_quote">
            <div dir="ltr" class="gmail_attr">вт, 27 дек. 2022 г., 03:57
              Terje J. Hanssen <<a href="mailto:terjejhanssen@gmail.com" rel="noreferrer noreferrer noreferrer" target="_blank">terjejhanssen@gmail.com</a>>:<br>
            </div>
            <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <div> <br>
                <br>
                <div>Den 26.12.2022 23:01, skrev Andrew Randrianasulu:<br>
                </div>
                <blockquote type="cite">
                  <div dir="auto"><a href="https://superuser.com/questions/879216/how-to-determine-whether-blu-ray-disc-is-htl-or-lth" rel="noreferrer noreferrer noreferrer noreferrer
                      noreferrer noreferrer noreferrer" target="_blank">https://superuser.com/questions/879216/how-to-determine-whether-blu-ray-disc-is-htl-or-lth</a>
                    <div dir="auto"><br>
                    </div>
                    <div dir="auto">lists two methods one with cdrecord
                      + internet, another one using imgburn</div>
                    <div dir="auto"><br>
                    </div>
                    <div dir="auto">===</div>
                    <div dir="auto">
                      <p>Here's the best way I've found:</p>
                      <ol>
                        <li style="margin:0px 0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;font-size:16.2163px;vertical-align:baseline">
                          <p style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline">Determine
                            the manufacturer code and media type of the
                            media. On Linux, I used <a href="http://cdrtools.sourceforge.net/private/cdrecord.html" style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;font-size:15px;vertical-align:baseline" rel="noreferrer noreferrer noreferrer
                              noreferrer noreferrer noreferrer" target="_blank"><code style="margin:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;vertical-align:baseline;white-space:pre-wrap">cdrecord</code></a> <code style="margin:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;vertical-align:baseline;white-space:pre-wrap">dev=XXX -atip | grep -i 'manufacturer\|media type'</code>,
                            where <code style="margin:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;vertical-align:baseline;white-space:pre-wrap">XXX</code> is
                            the code for the Blu-ray burner as listed
                            by <code style="margin:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;vertical-align:baseline;white-space:pre-wrap">cdrecord -scanbus</code>.</p>
                        </li>
                      </ol>
                    </div>
                  </div>
                </blockquote>
                <br>
                <font face="Courier New, Courier, monospace">This give
                  me an opportunity to discuss certain reported issues
                  with access privilegies from K3b/Cdrecord.<br>
                  <br>
                  I have also reported this as a possible K3b build bug
                  to openSUSE bugzilla a couple of weeks ago<br>
                  <a href="https://bugzilla.opensuse.org/show_bug.cgi?id=1206384" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">https://bugzilla.opensuse.org/show_bug.cgi?id=1206384</a><br>
                  <br>
                  Suggestions are welcome how to troubleshoot and get
                  rid of them, as they can be part of or main cause to
                  my burning/disc problem. !?<br>
                  <br>
                  <br>
                </font>
                <blockquote><font face="Courier New, Courier, monospace">cdrecord
                    -scanbus</font><br>
                  <font face="Courier New, Courier, monospace">Cdrecord-ProDVD-ProBD-Clone
                    3.02a09 (x86_64-unknown-linux-gnu) Copyright (C)
                    1995-2016 Joerg Schilling</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    Insufficient 'file read' privileges. You will not be
                    able to open all needed devices.</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    Insufficient 'file write' privileges. You will not
                    be able to open all needed devices.</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    Insufficient 'device' privileges. You may not be
                    able to send all needed SCSI commands, this my cause
                    various unexplainable problems.</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    Insufficient 'network' privileges. You will not be
                    able to do remote SCSI.</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    No access. Cannot open '/dev/sg0'. Cannot open or
                    use SCSI driver.</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    For possible targets try 'cdrecord -scanbus'. Make
                    sure you are root.</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    For possible transport specifiers try 'cdrecord
                    dev=help'.</font><br>
                  <br>
                  <font face="Courier New, Courier, monospace">cdrecord
                    dev=/dev/sr0 -atip | grep -i 'manufacturer\|media
                    type'</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    Insufficient 'file read' privileges. You will not be
                    able to open all needed devices.</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    Insufficient 'file write' privileges. You will not
                    be able to open all needed devices.</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    Insufficient 'device' privileges. You may not be
                    able to send all needed SCSI commands, this my cause
                    various unexplainable problems.</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    Insufficient 'network' privileges. You will not be
                    able to do remote SCSI.</font><br>
                  <font face="Courier New, Courier, monospace">scsidev:
                    '/dev/sr0'</font><br>
                  <font face="Courier New, Courier, monospace">devname:
                    '/dev/sr0'</font><br>
                  <font face="Courier New, Courier, monospace">scsibus:
                    -2 target: -2 lun: -2</font><br>
                  <font face="Courier New, Courier, monospace">Warning:
                    Open by 'devname' is unintentional and not
                    supported.</font><br>
                  <font face="Courier New, Courier, monospace">Linux sg
                    driver version: 3.5.27</font><br>
                  <font face="Courier New, Courier, monospace">Manufacturer:      
                    'VERBAT'</font><br>
                  <font face="Courier New, Courier, monospace">Media
                    type:         'IM1'</font><br>
                </blockquote>
              </div>
            </blockquote>
          </div>
        </div>
        <div dir="auto"><a href="https://github.com/netblue30/firejail/issues/2989" rel="noreferrer noreferrer noreferrer" target="_blank">https://github.com/netblue30/firejail/issues/2989</a><br>
        </div>
        <div dir="auto"><br>
        </div>
        <div dir="auto">I read somewhere in cdrtools documentation
          cdrecord may use linux capabilities ...</div>
        <div dir="auto"><br>
        </div>
        <div dir="auto">this issues suggest using</div>
        <div dir="auto"><br>
        </div>
        <div dir="auto">
          <pre style="font-family:ui-monospace,sfmono-regular,"sf mono",menlo,consolas,"liberation mono",monospace;font-size:11.9px;margin-top:0px;margin-bottom:16px;padding:16px;line-height:1.45;border-radius:6px;color:rgb(36,41,47)"><code style="font-family:ui-monospace,sfmono-regular,"sf mono",menlo,consolas,"liberation mono",monospace;padding:0px;margin:0px;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial;border-radius:6px;border:0px;display:inline;line-height:inherit">sudo getcap /usr/bin/cdrecord</code></pre>
        </div>
        <div dir="auto">So, I guess there should be setcap too?</div>
      </div>
    </blockquote>
    <br>
    I admit I have never heard about or used getcap and setcap before,
    but found them in the Leap package 'libcap-progs'.<br>
    I ran setcap as you suggested in your additional post 'cdrecord as
    user'.<br>
    The "<font face="Courier New, Courier, monospace">Insufficient
      'xxxx' privileges disappeared, but sorry not the failed burning.<br>
      <br>
      Five years ago I burned several labeled "LongLife" Verbatim BD-R
      DL/50 Gb discs with the same LG burner and previous K3b/Cdrecord.
      When these discs became EOL, I tried corresponding 'Mediarange'
      discs. These failed to burn and  Cdrecord returned an unknown
      error (code 254). This error 254 is posted on some forums with
      different solutions. <br>
      Some said burning could be broken by some unfrienly programs.
      Regarding Mediarange, Joerg Schilling suggested to upgrade the
      burner's firmware, but still no burning success with those
      Mediarange discs anymore.<br></font></div></blockquote></div></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto">I think xorriso is only disk burning program left with maintainer ...</div><div dir="auto"><br></div><div dir="auto">try it, and also try contact suggested at its homepage</div><div dir="auto"><br></div><div dir="auto">===</div><div dir="auto"><font size="+1"><dt>Contact for issues of this web page or the described program:</dt>
<dd>Thomas Schmitt, <a href="mailto:scdbackup@gmx.net" target="_blank" rel="noreferrer">scdbackup@gmx.net</a></dd><dd><br></dd></font></div><div dir="auto">====</div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><font face="Courier New, Courier, monospace">
      <br>
      My current Verbatim BD-R/RE DL/50 Gb discs are labeled "Hard Coat"
      - and respectively "M+A+B+L" resistant (layer for archival life),
      and "SERL" for up to 1000 times rewriteable. But LG/K3b don't like
      them and fails with error code 254. What is rather confusing, I
      have happend to successful burn a couple of these BD-RE discs,
      while most have failed after several trial.<br></font></div></blockquote></div></div><div dir="auto"><br></div><div dir="auto">well, may drive tries to defect manage them and got confused? (I myself write initially about background format here but then saw it named defect management)</div><div dir="auto"><br></div><div dir="auto"><a href="https://forums.linuxmint.com/viewtopic.php?t=246015">https://forums.linuxmint.com/viewtopic.php?t=246015</a><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><font face="Courier New, Courier, monospace">
    </font>
    <ul>
      <li><font face="Courier New, Courier, monospace">Typical output in
          the burning window is:</font></li>
      <li><font face="Courier New, Courier, monospace">SAO writing at 2x
          speed (default SAO and 3x selected)</font></li>
      <li><font face="Courier New, Courier, monospace">Cdrecord returned
          an unknown error (code 254)</font></li>
      <li><font face="Courier New, Courier, monospace">Sometimes TAO
          writing solves this issue (I have not tried that)</font></li>
      <li><font face="Courier New, Courier, monospace">(Another error </font>"Cannot
        fixate disk" has also appeared)<br>
      </li>
    </ul>
    <font face="Courier New, Courier, monospace"><br>
      I have currently had some more success to complete burn some
      unbranded BD-RE/DL discs from Slowmoose, with less failing. The
      remarkable is that the disc burn is so unstable and
      inconsistently, as it may fail on the first two attemps before it
      succeed on the third. Some burns may fail immediately, other not
      so fun after 1 or 1.5 hour(s), or ca. 1/3-1/2 of total burning
      time for 40 Gb)<br>
      <br>
      I maybe read somewhere that som other burning programs could
      "leave disc without "closing session" (or similar?), and Cdrecord
      next could run into issue to rewrite those discs afterwards. I
      know I have tried also 'dd' on some discs.<br>
      <br>
      Two of more or less related links<br>
    </font><font face="Courier New, Courier, monospace"><font face="Courier New, Courier, monospace"><a href="https://wiki.archlinux.org/title/Optical_disc_drive" rel="noreferrer noreferrer" target="_blank">https://wiki.archlinux.org/title/Optical_disc_drive</a><br>
      </font><a href="https://bbs.archlinux.org/viewtopic.php?id=58884" rel="noreferrer noreferrer" target="_blank">https://bbs.archlinux.org/viewtopic.php?id=58884</a><br>
      <br>
      <br>
    </font><br>
    <br>
    <blockquote type="cite">
      <div dir="auto">
        <div dir="auto">
          <div class="gmail_quote">
            <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <div><font face="Courier New, Courier, monospace"><br>
                  Just now K3b/Cdrecord seems to not even write to more
                  BD-RE DL discs :(<br>
                  <br>
                  The above messages are also part of the current
                  debugging output from K3b included here (sorry for the
                  length):<br>
                  <br>
                </font>
                <blockquote><font face="Courier New, Courier, monospace">Devices</font><br>
                  <font face="Courier New, Courier, monospace">-----------------------</font><br>
                  <font face="Courier New, Courier, monospace">HL-DT-ST
                    BD-RE  BH10LS30 1.02 (/dev/sr0, CD-R, CD-RW, CD-ROM,
                    DVD-ROM, DVD-R, DVD-RW, DVD-R DL, BD-ROM, BD-R,
                    BD-RE, DVD+R, DVD+RW, DVD+R DL) [DVD-ROM, DVD-R
                    Sequential, DVD-R Dual Layer Sequential, DVD-R Dual
                    Layer Jump, DVD-RAM, DVD-RW Restricted Overwrite,
                    DVD-RW Sequential, DVD+RW, DVD+R, DVD+R Dual Layer,
                    CD-ROM, CD-R, CD-RW, BD-ROM, BD-R Sequential (SRM),
                    BD-R Random (RRM), BD-RE] [SAO, TAO, RAW, SAO/R96P,
                    SAO/R96R, RAW/R16, RAW/R96P, RAW/R96R, Restricted
                    Overwrite, Layer Jump, Random Recording, Sequential
                    Recording, Sequential Recording + POW] [%7]</font><br>
                  <br>
                  <font face="Courier New, Courier, monospace">System</font><br>
                  <font face="Courier New, Courier, monospace">-----------------------</font><br>
                  <font face="Courier New, Courier, monospace">K3b
                    Version: 21.12.3</font><br>
                  <font face="Courier New, Courier, monospace">KDE
                    Version: 5.90.0</font><br>
                  <font face="Courier New, Courier, monospace">Qt
                    Version:  5.15.2</font><br>
                  <font face="Courier New, Courier, monospace">Kernel:     
                    5.14.21-150400.24.38-default</font><br>
                  <br>
                  <font face="Courier New, Courier, monospace">Used
                    versions</font><br>
                  <font face="Courier New, Courier, monospace">-----------------------</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    3.2a09</font><br>
                  <br>
                  <font face="Courier New, Courier, monospace">cdrecord</font><br>
                  <font face="Courier New, Courier, monospace">-----------------------</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    Insufficient 'file read' privileges. You will not be
                    able to open all needed devices.</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    Insufficient 'file write' privileges. You will not
                    be able to open all needed devices.</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    Insufficient 'device' privileges. You may not be
                    able to send all needed SCSI commands, this my cause
                    various unexplainable problems.</font><br>
                  <font face="Courier New, Courier, monospace">cdrecord:
                    Insufficient 'network' privileges. You will not be
                    able to do remote SCSI.</font><br>
                  <font face="Courier New, Courier, monospace">scsidev:
                    '/dev/sr0'</font><br>
                  <font face="Courier New, Courier, monospace">devname:
                    '/dev/sr0'</font><br>
                  <font face="Courier New, Courier, monospace">scsibus:
                    -2 target: -2 lun: -2</font><br>
                  <font face="Courier New, Courier, monospace">Warning:
                    Open by 'devname' is unintentional and not
                    supported.</font><br>
                  <font face="Courier New, Courier, monospace">Linux sg
                    driver version: 3.5.27</font><br>
                  <font face="Courier New, Courier, monospace">SCSI
                    buffer size: 64512</font><br>
                  <font face="Courier New, Courier, monospace">Cdrecord-ProDVD-ProBD-Clone
                    3.02a09 (x86_64-unknown-linux-gnu) Copyright (C)
                    1995-2016 Joerg Schilling</font><br>
                  <font face="Courier New, Courier, monospace">TOC Type:
                    1 = CD-ROM</font><br>
                  <font face="Courier New, Courier, monospace">Using
                    libscg version 'schily-0.9'.</font><br>
                  <font face="Courier New, Courier, monospace">Driveropts:
                    'burnfree'</font><br>
                  <font face="Courier New, Courier, monospace">atapi: 1</font><br>
                  <font face="Courier New, Courier, monospace">Device
                    type    : Removable CD-ROM</font><br>
                  <font face="Courier New, Courier, monospace">Version       
                    : 5</font><br>
                  <font face="Courier New, Courier, monospace">Response
                    Format: 2</font><br>
                  <font face="Courier New, Courier, monospace">Capabilities  
                    : </font><br>
                  <font face="Courier New, Courier, monospace">Vendor_info   
                    : 'HL-DT-ST'</font><br>
                  <font face="Courier New, Courier, monospace">Identifikation
                    : 'BD-RE  BH10LS30 '</font><br>
                  <font face="Courier New, Courier, monospace">Revision      
                    : '1.02'</font><br>
                  <font face="Courier New, Courier, monospace">Device
                    seems to be: Generic mmc2 DVD-R/DVD-RW/DVD-RAM.</font><br>
                  <font face="Courier New, Courier, monospace">Current:
                    BD-RE</font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    BD-ROM </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    BD-R sequential recording </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    BD-R random recording </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    BD-RE (current)</font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    DVD-RAM </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    DVD-R sequential recording </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    DVD-R/DL sequential recording </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    DVD-R/DL layer jump recording </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    DVD-RW sequential recording </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    DVD-RW restricted overwrite </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    DVD+RW </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    DVD+R </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    DVD+R/DL </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    DVD-ROM </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    CD-R </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    CD-RW </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    CD-ROM </font><br>
                  <font face="Courier New, Courier, monospace">Profile:
                    Removable Disk (current)</font><br>
                  <font face="Courier New, Courier, monospace">Using
                    generic SCSI-3/mmc-3 BD-RE driver (mmc_bdre).</font><br>
                  <font face="Courier New, Courier, monospace">Driver
                    flags   : NO-CD BD MMC-3 BURNFREE </font><br>
                  <font face="Courier New, Courier, monospace">Supported
                    modes: PACKET SAO LAYER_JUMP</font><br>
                  <font face="Courier New, Courier, monospace">Drive buf
                    size : 2031616 = 1984 KB</font><br>
                  <font face="Courier New, Courier, monospace">Drive
                    pbuf size: 3850240 = 3760 KB</font><br>
                  <font face="Courier New, Courier, monospace">Drive DMA
                    Speed: 17771 kB/s 100x CD 12x DVD 3x BD</font><br>
                  <font face="Courier New, Courier, monospace">FIFO
                    size      : 4194304 = 4096 KB</font><br>
                  <font face="Courier New, Courier, monospace">Track 01:
                    data  39383 MB        </font><br>
                  <font face="Courier New, Courier, monospace">Total
                    size:     39383 MB = 20164288 sectors</font><br>
                  <font face="Courier New, Courier, monospace">Current
                    Secsize: 0</font><br>
                  <font face="Courier New, Courier, monospace">   
                    Capacity  Blklen/Sparesz.  Format-type  Type</font><br>
                  <font face="Courier New, Courier, monospace">   
                    24438784            36864         0x00  Unformated
                    or Blank Media</font><br>
                  <font face="Courier New, Courier, monospace">   
                    23652352            24576         0x00  Reserved (0)</font><br>
                  <font face="Courier New, Courier, monospace">   
                    23259136             2048         0x01  Reserved (0)</font><br>
                  <font face="Courier New, Courier, monospace">   
                    23652352            24576         0x30  Reserved (0)</font><br>
                  <font face="Courier New, Courier, monospace">   
                    23259136            36864         0x30  Reserved (0)</font><br>
                  <font face="Courier New, Courier, monospace">   
                    24307712             4096         0x30  Reserved (0)</font><br>
                  <font face="Courier New, Courier, monospace">   
                    24438784             2048         0x31  Reserved (0)</font><br>
                  <font face="Courier New, Courier, monospace">Format
                    was needed.</font><br>
                  <font face="Courier New, Courier, monospace">Starting
                    to write CD/DVD/BD at speed 2 in real FORMAT mode
                    for single session.</font><br>
                  <font face="Courier New, Courier, monospace">Last
                    chance to quit, starting real write in 3 seconds.</font><br>
                  <font face="Courier New, Courier, monospace">   2
                    seconds.</font><br>
                  <font face="Courier New, Courier, monospace">   1
                    seconds.</font><br>
                  <font face="Courier New, Courier, monospace">   0
                    seconds. Operation starts.</font><br>
                  <font face="Courier New, Courier, monospace">Formatting
                    media</font><br>
                  <font face="Courier New, Courier, monospace">operation
                    0% done</font><br>
                  <font face="Courier New, Courier, monospace">=== last
                    message repeated 29 times. ===</font><br>
                  <font face="Courier New, Courier, monospace">Formatting
                    time:   61.464s (00:01:01.464)</font><br>
                  <font face="Courier New, Courier, monospace">Condition
                    not caught: capacity_not_set.</font><br>
                  <br>
                  <font face="Courier New, Courier, monospace">cdrecord
                    command:</font><br>
                  <font face="Courier New, Courier, monospace">-----------------------</font><br>
                  <font face="Courier New, Courier, monospace">/usr/bin/cdrecord
                    -v gracetime=2 dev=/dev/sr0 speed=2 -sao
                    driveropts=burnfree -data -tsize=20164288s -</font><br>
                </blockquote>
                <br>
                <br>
                <blockquote type="cite">
                  <div dir="auto">
                    <div dir="auto">
                      <ol>
                        <li style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;font-size:16.2163px;vertical-align:baseline">
                          <p style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline">Look
                            up the manufacturer and media type codes at <a href="http://www.blu-raydisc.info/licensee-list/discmanuid-licenseelist.php" style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline" rel="noreferrer noreferrer noreferrer
                              noreferrer noreferrer noreferrer" target="_blank">http://www.blu-raydisc.info/licensee-list/discmanuid-licenseelist.php</a> .
                            The table on that site identifies "recording
                            type" (i.e. HTL or LTH) and also write speed
                            from these codes.</p>
                        </li>
                      </ol>
                      <div dir="auto"><font face="-apple-system,
                          blinkmacsystemfont, segoe ui adjusted, segoe
                          ui, liberation sans, sans-serif" color="#232629"><span style="font-size:16.2163px">=== quote
                            end====</span></font></div>
                      <div dir="auto"><font face="-apple-system,
                          blinkmacsystemfont, segoe ui adjusted, segoe
                          ui, liberation sans, sans-serif" color="#232629"><span style="font-size:16.2163px"><br>
                          </span></font></div>
                      <div dir="auto"><font face="-apple-system,
                          blinkmacsystemfont, segoe ui adjusted, segoe
                          ui, liberation sans, sans-serif" color="#232629"><span style="font-size:16.2163px">site worked when
                            I clicked on link.</span></font></div>
                      <div dir="auto"><font face="-apple-system,
                          blinkmacsystemfont, segoe ui adjusted, segoe
                          ui, liberation sans, sans-serif" color="#232629"><span style="font-size:16.2163px"><br>
                          </span></font></div>
                      <div dir="auto"><font face="-apple-system,
                          blinkmacsystemfont, segoe ui adjusted, segoe
                          ui, liberation sans, sans-serif" color="#232629"><span style="font-size:16.2163px">Apparently LTH
                            should be marked due to their bad
                            compatibility with earlier drives, but ....
                            reality is less stellar :(</span></font></div>
                    </div>
                  </div>
                </blockquote>
                <br>
                <font color="#232629"><font face="-apple-system,
                    blinkmacsystemfont, segoe ui adjusted, segoe ui,
                    liberation sans, sans-serif">A quick look in the
                    tables it seemed for me that all 50GB BD-R/RE DL
                    discs use "HTL" recording type.<br>
                    <br>
                    <br>
                  </font></font>
                <blockquote type="cite">
                  <div dir="auto">
                    <div dir="auto">
                      <div dir="auto"><font face="-apple-system,
                          blinkmacsystemfont, segoe ui adjusted, segoe
                          ui, liberation sans, sans-serif" color="#232629"><span style="font-size:16.2163px"><br>
                          </span></font></div>
                      <div dir="auto"><font face="-apple-system,
                          blinkmacsystemfont, segoe ui adjusted, segoe
                          ui, liberation sans, sans-serif" color="#232629"><span style="font-size:16.2163px">and in imgburn</span></font></div>
                      <div dir="auto"><font face="-apple-system,
                          blinkmacsystemfont, segoe ui adjusted, segoe
                          ui, liberation sans, sans-serif" color="#232629"><span style="font-size:16.2163px"><br>
                          </span></font></div>
                      <div dir="auto"><font face="-apple-system,
                          blinkmacsystemfont, segoe ui adjusted, segoe
                          ui, liberation sans, sans-serif" color="#232629"><span style="font-size:16.2163px">====</span></font></div>
                      <div dir="auto">
                        <p>With image burning software. <a href="http://www.imgburn.com/" style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline" rel="noreferrer noreferrer noreferrer noreferrer noreferrer" target="_blank">ImgBurn</a> for
                          instance.</p>
                        <p>In Imgburn main menu just click on anything
                          writing related. For example, "Write image
                          file to disc"</p>
                        <p>Now a new window pops up</p>
                        <p>Please check that you have the correct burner
                          selected in the left hand side, if you have
                          more than one disc burner.</p>
                        <p>Scroll down on the right pane, and you find
                          the info under "Recorded Mark Polarity"</p>
                      </div>
                      <div dir="auto"><font face="-apple-system,
                          blinkmacsystemfont, segoe ui adjusted, segoe
                          ui, liberation sans, sans-serif" color="#232629"><span style="font-size:16.2163px">====</span></font></div>
                    </div>
                    <div dir="auto">
                      <div dir="auto"><br>
                      </div>
                      <div dir="auto"><br>
                      </div>
                      <div dir="auto">HTL is apparently more durable....</div>
                      <div dir="auto"><br>
                      </div>
                      <div dir="auto">Terje posted link to Canadian site
                        and I did little search on my own</div>
                      <div dir="auto"><br>
                      </div>
                      <div dir="auto"><a href="https://www.pcworld.com/article/423607/hard-core-data-preservation-the-best-media-and-methods-for-archiving-your-data.html" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">https://www.pcworld.com/article/423607/hard-core-data-preservation-the-best-media-and-methods-for-archiving-your-data.html</a><br>
                      </div>
                      <div dir="auto">(from 2016)</div>
                      <div dir="auto"><br>
                      </div>
                      <div dir="auto">to be honest I newer heard about
                        HTL vs LTH when it comes to BDs....</div>
                      <div dir="auto"><br>
                      </div>
                      <div dir="auto">I found some ASUS  drive in my
                        city, so *may be* I'll have some means to test
                        real disks in new year.</div>
                      <div dir="auto"><br>
                      </div>
                      <div dir="auto"><br>
                      </div>
                    </div>
                  </div>
                </blockquote>
                <br>
                Many articles recommend to keep three types of media for
                archiving stored on at least two locations to spread the
                risk.<br>
                For camcorded video this envolves for me <br>
                <ol>
                  <li>keep the source media (tape cassettes)</li>
                  <li>a digitized version on portable expansion USB3
                    discs</li>
                  <li>and on optical Blu-ray data discs and playable
                    BD-video discs.   </li>
                </ol>
                <br>
                <br>
              </div>
            </blockquote>
          </div>
        </div>
      </div>
    </blockquote>
    <br>
  </div>

</blockquote></div></div></div>