Den 26.12.2022 23:01, skrev Andrew Randrianasulu:
https://superuser.com/questions/879216/how-to-determine-whether-blu-ray-disc-is-htl-or-lth

lists two methods one with cdrecord + internet, another one using imgburn

===

Here's the best way I've found:

  1. Determine the manufacturer code and media type of the media. On Linux, I used cdrecord dev=XXX -atip | grep -i 'manufacturer\|media type', where XXX is the code for the Blu-ray burner as listed by cdrecord -scanbus.


This give me an opportunity to discuss certain reported issues with access privilegies from K3b/Cdrecord.

I have also reported this as a possible K3b build bug to openSUSE bugzilla a couple of weeks ago
https://bugzilla.opensuse.org/show_bug.cgi?id=1206384

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. !?
cdrecord -scanbus
Cdrecord-ProDVD-ProBD-Clone 3.02a09 (x86_64-unknown-linux-gnu) Copyright (C) 1995-2016 Joerg Schilling
cdrecord: Insufficient 'file read' privileges. You will not be able to open all needed devices.
cdrecord: Insufficient 'file write' privileges. You will not be able to open all needed devices.
cdrecord: Insufficient 'device' privileges. You may not be able to send all needed SCSI commands, this my cause various unexplainable problems.
cdrecord: Insufficient 'network' privileges. You will not be able to do remote SCSI.
cdrecord: No access. Cannot open '/dev/sg0'. Cannot open or use SCSI driver.
cdrecord: For possible targets try 'cdrecord -scanbus'. Make sure you are root.
cdrecord: For possible transport specifiers try 'cdrecord dev=help'.

cdrecord dev=/dev/sr0 -atip | grep -i 'manufacturer\|media type'
cdrecord: Insufficient 'file read' privileges. You will not be able to open all needed devices.
cdrecord: Insufficient 'file write' privileges. You will not be able to open all needed devices.
cdrecord: Insufficient 'device' privileges. You may not be able to send all needed SCSI commands, this my cause various unexplainable problems.
cdrecord: Insufficient 'network' privileges. You will not be able to do remote SCSI.
scsidev: '/dev/sr0'
devname: '/dev/sr0'
scsibus: -2 target: -2 lun: -2
Warning: Open by 'devname' is unintentional and not supported.
Linux sg driver version: 3.5.27
Manufacturer:       'VERBAT'
Media type:         'IM1'

Just now K3b/Cdrecord seems to not even write to more BD-RE DL discs :(

The above messages are also part of the current debugging output from K3b included here (sorry for the length):
Devices
-----------------------
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]

System
-----------------------
K3b Version: 21.12.3
KDE Version: 5.90.0
Qt Version:  5.15.2
Kernel:      5.14.21-150400.24.38-default

Used versions
-----------------------
cdrecord: 3.2a09

cdrecord
-----------------------
cdrecord: Insufficient 'file read' privileges. You will not be able to open all needed devices.
cdrecord: Insufficient 'file write' privileges. You will not be able to open all needed devices.
cdrecord: Insufficient 'device' privileges. You may not be able to send all needed SCSI commands, this my cause various unexplainable problems.
cdrecord: Insufficient 'network' privileges. You will not be able to do remote SCSI.
scsidev: '/dev/sr0'
devname: '/dev/sr0'
scsibus: -2 target: -2 lun: -2
Warning: Open by 'devname' is unintentional and not supported.
Linux sg driver version: 3.5.27
SCSI buffer size: 64512
Cdrecord-ProDVD-ProBD-Clone 3.02a09 (x86_64-unknown-linux-gnu) Copyright (C) 1995-2016 Joerg Schilling
TOC Type: 1 = CD-ROM
Using libscg version 'schily-0.9'.
Driveropts: 'burnfree'
atapi: 1
Device type    : Removable CD-ROM
Version        : 5
Response Format: 2
Capabilities   :
Vendor_info    : 'HL-DT-ST'
Identifikation : 'BD-RE  BH10LS30 '
Revision       : '1.02'
Device seems to be: Generic mmc2 DVD-R/DVD-RW/DVD-RAM.
Current: BD-RE
Profile: BD-ROM
Profile: BD-R sequential recording
Profile: BD-R random recording
Profile: BD-RE (current)
Profile: DVD-RAM
Profile: DVD-R sequential recording
Profile: DVD-R/DL sequential recording
Profile: DVD-R/DL layer jump recording
Profile: DVD-RW sequential recording
Profile: DVD-RW restricted overwrite
Profile: DVD+RW
Profile: DVD+R
Profile: DVD+R/DL
Profile: DVD-ROM
Profile: CD-R
Profile: CD-RW
Profile: CD-ROM
Profile: Removable Disk (current)
Using generic SCSI-3/mmc-3 BD-RE driver (mmc_bdre).
Driver flags   : NO-CD BD MMC-3 BURNFREE
Supported modes: PACKET SAO LAYER_JUMP
Drive buf size : 2031616 = 1984 KB
Drive pbuf size: 3850240 = 3760 KB
Drive DMA Speed: 17771 kB/s 100x CD 12x DVD 3x BD
FIFO size      : 4194304 = 4096 KB
Track 01: data  39383 MB        
Total size:     39383 MB = 20164288 sectors
Current Secsize: 0
    Capacity  Blklen/Sparesz.  Format-type  Type
    24438784            36864         0x00  Unformated or Blank Media
    23652352            24576         0x00  Reserved (0)
    23259136             2048         0x01  Reserved (0)
    23652352            24576         0x30  Reserved (0)
    23259136            36864         0x30  Reserved (0)
    24307712             4096         0x30  Reserved (0)
    24438784             2048         0x31  Reserved (0)
Format was needed.
Starting to write CD/DVD/BD at speed 2 in real FORMAT mode for single session.
Last chance to quit, starting real write in 3 seconds.
   2 seconds.
   1 seconds.
   0 seconds. Operation starts.
Formatting media
operation 0% done
=== last message repeated 29 times. ===
Formatting time:   61.464s (00:01:01.464)
Condition not caught: capacity_not_set.

cdrecord command:
-----------------------
/usr/bin/cdrecord -v gracetime=2 dev=/dev/sr0 speed=2 -sao driveropts=burnfree -data -tsize=20164288s -


  1. Look up the manufacturer and media type codes at http://www.blu-raydisc.info/licensee-list/discmanuid-licenseelist.php . The table on that site identifies "recording type" (i.e. HTL or LTH) and also write speed from these codes.

=== quote end====

site worked when I clicked on link.

Apparently LTH should be marked due to their bad compatibility with earlier drives, but .... reality is less stellar :(

A quick look in the tables it seemed for me that all 50GB BD-R/RE DL discs use "HTL" recording type.

and in imgburn

====

With image burning software. ImgBurn for instance.

In Imgburn main menu just click on anything writing related. For example, "Write image file to disc"

Now a new window pops up

Please check that you have the correct burner selected in the left hand side, if you have more than one disc burner.

Scroll down on the right pane, and you find the info under "Recorded Mark Polarity"

====


HTL is apparently more durable....

Terje posted link to Canadian site and I did little search on my own

https://www.pcworld.com/article/423607/hard-core-data-preservation-the-best-media-and-methods-for-archiving-your-data.html
(from 2016)

to be honest I newer heard about HTL vs LTH when it comes to BDs....

I found some ASUS  drive in my city, so *may be* I'll have some means to test real disks in new year.



Many articles recommend to keep three types of media for archiving stored on at least two locations to spread the risk.
For camcorded video this envolves for me
  1. keep the source media (tape cassettes)
  2. a digitized version on portable expansion USB3 discs
  3. and on optical Blu-ray data discs and playable BD-video discs.