Hi, i cannot say much about K3B, iso i make a few general statements about BD-R recording on Debian.
> - K3b burn @ 1.9x That's probably Defect Management on formatted BD-R, which checkreads the medium during writing. I'm not a big fan of it. growisofs formats BD-R media by default, which enables Defect Management, unless the drive gets told to prefer speed over pickiness. cdrecord, cdrskin, and xorriso do not format BD-R by default. cdrskin option stream_recording=on and xorriso command -stream_recording "on" disable Defect Management with formatted BD-R and with BD-RE (which cannot be used unformatted). Xfburn is supposed to work with BD-R and to offer a checkbox "Stream Recording": https://docs.xfce.org/apps/xfburn/start It uses the same libburn as xorriso and cdrskin do. > Impossible to burn blu-ray archive files correctly on Debian. I do my backups by help of xorriso of which i am the upstream developer. See a simple example from the generously sized man page https://manpages.debian.org/trixie/xorriso/xorriso.1.en.html slightly modified for archive-grade fidelity, drive address, and recording speed: xorriso -for_backup \ -outdev /dev/sr0 \ -blank as_needed \ -stream_recording on \ -map /home/me/sounds /sounds \ -map /home/me/pictures /pictures This run enables recording of MD5 checksums, ACL, and extended file attributes. It chooses drive /dev/sr0 and blanks the medium if it is a written CD-RW, DVD-R, DVD-RW or an overwritable medium with an ISO 9660 filesystem. It disables slow and picky Defect Management. Then it copies the hard disk directory tree /home/me/sounds to the directory tree /sounds in the emerging ISO. The same with "pictures". The recorded MD5 checksums can later be verified by xorriso -for_backup -indev /dev/sr0 -check_media -- to check superblock, directory tree area, and file content area, Use xorriso -for_backup -indev /dev/sr0 -check_md5_r sorry / -- to check the individual file's content in the data area. This will be able to tell the names of damaged files, after -check_media has confirmed superblock and directories but reports mismatch of the overall file content area. Have a nice day :) Thomas
