I changed the component back to growisofs since the issue is reproducible without k3b. I opened Bug 316384 "k3b cannot verify BD-R due to i/o error but logs shows none" at upstream for k3b being unable to "verify" the burned files (and just that). Please ignore comments: #1, #2, #3 These might be different issues, i might open a bug-report for those if i can reproduce them. I could not test the builds from #4, at that time. I experimented with xorrisofs (comments #4, #5, #6) and nero for linux. I will use this bug-report for tracking the error described in both the Description (comment#0) and in comment#7. I tried with nero for linux, and it did not exhibit the issue at all. Nero also had no troubles verifying the burned files. # nerocmd --bd --verify --volume-name=demo --udf --rockridge --write --drive=11,0,0 --close-session --data /data2/* You're running a demo version. Your license is valid until : 04/08/13 Checking discs [i] Checking discs PHASE: Start cache Writing to cache [i] Caching of files started PHASE: Done cache [i] Caching of files completed [i] The current process cannot be interrupted PHASE: Start write Writing to disc [i] Burn process started at 10x (44950 KB/s) Writing lead-in [i] Writing lead-in Writing tracks [i] Writing tracks Writing lead-out [i] Writing lead-out [i] The process can be interrupted again PHASE: Done write [i] Burn process completed successfully at 10x (44950 KB/s) PHASE: Verify compilation Verifying disc [i] Data verification started PHASE: Verify end ok ....... [i] Data verification completed successfully Ok. But for growisofs the issue does still happens for the first session only. The next sessions do work ok. # growisofs -Z /dev/sr0 -R -J 1/ Executing 'mkisofs -R -J 1/ | builtin_dd of=/dev/sr0 obs=32k seek=0' I: -input-charset not specified, using utf-8 (detected in locale settings) 1.31% done, estimate finish Sat Mar 9 17:01:32 2013 /dev/sr0: pre-formatting blank BD-R for 24.8GB... /dev/sr0: "Current Write Speed" is 10.2x4390KBps. 2.62% done, estimate finish Sat Mar 9 17:23:46 2013 3.93% done, estimate finish Sat Mar 9 17:22:18 2013 5.24% done, estimate finish Sat Mar 9 17:19:39 2013 6.55% done, estimate finish Sat Mar 9 17:19:05 2013 7.86% done, estimate finish Sat Mar 9 17:19:58 2013 9.17% done, estimate finish Sat Mar 9 17:18:58 2013 10.48% done, estimate finish Sat Mar 9 17:18:23 2013 11.79% done, estimate finish Sat Mar 9 17:18:38 2013 13.10% done, estimate finish Sat Mar 9 17:18:27 2013 14.41% done, estimate finish Sat Mar 9 17:17:50 2013 15.72% done, estimate finish Sat Mar 9 17:17:57 2013 17.03% done, estimate finish Sat Mar 9 17:17:52 2013 18.34% done, estimate finish Sat Mar 9 17:17:15 2013 19.65% done, estimate finish Sat Mar 9 17:17:13 2013 20.96% done, estimate finish Sat Mar 9 17:17:07 2013 22.27% done, estimate finish Sat Mar 9 17:16:57 2013 23.58% done, estimate finish Sat Mar 9 17:16:22 2013 24.89% done, estimate finish Sat Mar 9 17:16:19 2013 26.20% done, estimate finish Sat Mar 9 17:15:39 2013 27.51% done, estimate finish Sat Mar 9 17:15:17 2013 28.82% done, estimate finish Sat Mar 9 17:15:03 2013 30.13% done, estimate finish Sat Mar 9 17:14:55 2013 31.44% done, estimate finish Sat Mar 9 17:14:34 2013 32.75% done, estimate finish Sat Mar 9 17:14:21 2013 34.06% done, estimate finish Sat Mar 9 17:14:03 2013 35.37% done, estimate finish Sat Mar 9 17:13:44 2013 36.68% done, estimate finish Sat Mar 9 17:13:20 2013 37.99% done, estimate finish Sat Mar 9 17:13:01 2013 39.30% done, estimate finish Sat Mar 9 17:12:56 2013 40.61% done, estimate finish Sat Mar 9 17:12:36 2013 41.92% done, estimate finish Sat Mar 9 17:12:25 2013 43.22% done, estimate finish Sat Mar 9 17:12:19 2013 44.54% done, estimate finish Sat Mar 9 17:12:05 2013 45.84% done, estimate finish Sat Mar 9 17:11:53 2013 47.16% done, estimate finish Sat Mar 9 17:11:40 2013 48.46% done, estimate finish Sat Mar 9 17:11:30 2013 49.78% done, estimate finish Sat Mar 9 17:11:18 2013 51.08% done, estimate finish Sat Mar 9 17:11:05 2013 52.40% done, estimate finish Sat Mar 9 17:10:53 2013 53.70% done, estimate finish Sat Mar 9 17:10:45 2013 55.01% done, estimate finish Sat Mar 9 17:10:35 2013 56.32% done, estimate finish Sat Mar 9 17:10:24 2013 57.63% done, estimate finish Sat Mar 9 17:10:15 2013 58.94% done, estimate finish Sat Mar 9 17:10:06 2013 60.25% done, estimate finish Sat Mar 9 17:09:54 2013 61.56% done, estimate finish Sat Mar 9 17:09:49 2013 62.87% done, estimate finish Sat Mar 9 17:09:40 2013 64.18% done, estimate finish Sat Mar 9 17:09:31 2013 65.49% done, estimate finish Sat Mar 9 17:09:23 2013 66.80% done, estimate finish Sat Mar 9 17:09:16 2013 68.11% done, estimate finish Sat Mar 9 17:09:08 2013 69.42% done, estimate finish Sat Mar 9 17:09:01 2013 70.73% done, estimate finish Sat Mar 9 17:08:54 2013 72.04% done, estimate finish Sat Mar 9 17:08:49 2013 73.35% done, estimate finish Sat Mar 9 17:08:41 2013 74.66% done, estimate finish Sat Mar 9 17:08:35 2013 75.97% done, estimate finish Sat Mar 9 17:08:29 2013 77.28% done, estimate finish Sat Mar 9 17:08:23 2013 78.59% done, estimate finish Sat Mar 9 17:08:19 2013 79.90% done, estimate finish Sat Mar 9 17:08:13 2013 81.21% done, estimate finish Sat Mar 9 17:08:10 2013 82.52% done, estimate finish Sat Mar 9 17:08:05 2013 83.83% done, estimate finish Sat Mar 9 17:08:00 2013 85.14% done, estimate finish Sat Mar 9 17:07:56 2013 86.45% done, estimate finish Sat Mar 9 17:07:50 2013 87.76% done, estimate finish Sat Mar 9 17:07:46 2013 89.07% done, estimate finish Sat Mar 9 17:07:43 2013 90.38% done, estimate finish Sat Mar 9 17:07:39 2013 91.69% done, estimate finish Sat Mar 9 17:07:36 2013 93.00% done, estimate finish Sat Mar 9 17:07:32 2013 94.31% done, estimate finish Sat Mar 9 17:07:28 2013 95.62% done, estimate finish Sat Mar 9 17:07:24 2013 96.93% done, estimate finish Sat Mar 9 17:07:20 2013 98.24% done, estimate finish Sat Mar 9 17:07:17 2013 99.55% done, estimate finish Sat Mar 9 17:07:12 2013 Total translation table size: 0 Total rockridge attributes bytes: 246 Total directory bytes: 0 Path table size(bytes): 10 Max brk space used 0 381743 extents written (745 MB) builtin_dd: 381744*2KB out @ average 0.6x4390KBps /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 /dev/sr0: reloading tray Current Software version: kernel 3.7.9-104.fc17.x86_64 dvd+rw-tools.x86_64 7.1-9.fc17