When i start a write process, K3b works fine for the first disk (4x bluray write speed).
When i start a second write process, K3b writes most of the time with 1x write speed only (very annoying ) and always quits with "Error" message at 100% (instead of Finished/Success).
The second disc can always be read, and seems to have all data written.
Even if i quit K3b and restart K3b prior second write project it happens.
Only a reboot makes the first write process work normally again.

Log:

Code: Select all

Burned media
-----------------------
BD-R Sequential (SRM)

Devices
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PIONEER BD-RW   BDR-UD04 1.11 (/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]

K3b::IsoImager
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mkisofs print size result: 32768245 (67109365760 bytes)

System
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K3b Version: 20.4.3
KDE Version: 5.71.0
Qt Version:  5.15.0
Kernel:      5.7.9-1-MANJARO

Used versions
-----------------------
mkisofs: 3.2a09
growisofs: 7.1

growisofs
-----------------------
Executing 'builtin_dd if=/dev/fd/0 of=/dev/sr0 obs=32k seek=0'
/dev/sr0: pre-formatting blank BD-R for 100.1GB...
/dev/sr0: "Current Write Speed" is 4.1x4390KBps.
   15138816/67109365760 ( 0.0%) @0.7x, remaining 443:11 RBU 100.0% UBU   3.0%
   28114944/67109365760 ( 0.0%) @0.9x, remaining 357:53 RBU 100.0% UBU 100.0%
.........
.........
67058532352/67109365760 (99.9%) @0.9x, remaining 0:08 RBU 100.0% UBU 100.0%
67071836160/67109365760 (99.9%) @0.9x, remaining 0:06 RBU 100.0% UBU 100.0%
/dev/sr0: flushing cache
/dev/sr0: closing track
/dev/sr0: closing session
:-[ CLOSE SESSION failed with SK=5h/INVALID FIELD IN CDB]: Input/output error

growisofs command:
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/usr/bin/growisofs -Z /dev/sr0=/dev/fd/0 -use-the-force-luke=notray -use-the-force-luke=tty -use-the-force-luke=4gms -use-the-force-luke=tracksize:32768245 -speed=4 -use-the-force-luke=bufsize:32m

mkisofs
-----------------------
mkisofs: Warning: Cannot add inode hints with -no-cache-inodes.
32768245
mkisofs: Warning: Cannot add inode hints with -no-cache-inodes.
Setting input-charset to 'UTF-8' from locale.
Using FILE.EXT;1 for PATH/PATH/FILE.EXT
....... 
  0,02% done, estimate finish Wed Jul 29 15:20:25 2020
.....

=== last message repeated 2 times. ===
 99,98% done, estimate finish Wed Jul 29 15:34:02 2020
=== last message repeated 2 times. ===
 99,99% done, estimate finish Wed Jul 29 15:34:03 2020
=== last message repeated 7 times. ===
100,00% done, estimate finish Wed Jul 29 15:34:04 2020
=== last message repeated 3 times. ===
Total translation table size: 0
Total rockridge attributes bytes: 488227
Total directory bytes: 832224
Path table size(bytes): 478
Max brk space used 4be000
32768245 extents written (64000 MB)

mkisofs calculate size command:
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/usr/bin/mkisofs -gui -graft-points -print-size -quiet -volid PhotoBackup5 -volset  -appid K3B THE CD KREATOR (C) 1998-2018 SEBASTIAN TRUEG, MICHAL MALEK AND LESLIE ZHAI -publisher  -preparer  -sysid LINUX -volset-size 1 -volset-seqno 1 -sort /tmp/k3b.BfnHeA -rational-rock -hide-list /tmp/k3b.IrezSM -joliet -joliet-long -hide-joliet-list /tmp/k3b.jfbzdQ -no-cache-inodes -udf -full-iso9660-filenames -iso-level 3 -path-list /tmp/k3b.AGJSev

mkisofs command:
-----------------------
/usr/bin/mkisofs -gui -graft-points -volid PhotoBackup5 -volset  -appid K3B THE CD KREATOR (C) 1998-2018 SEBASTIAN TRUEG, MICHAL MALEK AND LESLIE ZHAI -publisher  -preparer  -sysid LINUX -volset-size 1 -volset-seqno 1 -sort /tmp/k3b.htuZvj -rational-rock -hide-list /tmp/k3b.VwZpla -joliet -joliet-long -hide-joliet-list /tmp/k3b.acqzEV -no-cache-inodes -udf -full-iso9660-filenames -iso-level 3 -path-list /tmp/k3b.oxKZnO