Created attachment 708056 blkparse file obtained from blktrace the command below Test #1: Eject any disc and leave the optical drive empty. Start the blktrace instance over the optical drive: # blktrace -d /dev/sr0 -o - &> ~/blkt-BD-R-20130310.02.out Inser a blank BD-R media on the optical drive and Burn with growisofs: # growisofs -Z /dev/sr0 -R -J ./1/* Stop the blktrace instance over the optical drive (CTRL+C) Obtain a human readable output of the captured file: # cat blkt-BD-R-20130310.02.out | blkparse -i - -o blkparse-BD-R-20130310.02.out Output of the command: # growisofs -Z /dev/sr0 -R -J ./1/* Executing 'mkisofs -R -J ./1/1.dat | 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 Sun Mar 10 16:51:23 2013 /dev/sr0: pre-formatting blank BD-R for 24.8GB... /dev/sr0: "Current Write Speed" is 10.2x4390KBps. 2.62% done, estimate finish Sun Mar 10 17:14:53 2013 3.93% done, estimate finish Sun Mar 10 17:08:45 2013 5.24% done, estimate finish Sun Mar 10 17:04:44 2013 6.55% done, estimate finish Sun Mar 10 17:02:19 2013 7.86% done, estimate finish Sun Mar 10 17:00:42 2013 9.17% done, estimate finish Sun Mar 10 16:59:33 2013 10.48% done, estimate finish Sun Mar 10 16:58:41 2013 11.79% done, estimate finish Sun Mar 10 16:58:01 2013 13.10% done, estimate finish Sun Mar 10 16:57:29 2013 14.41% done, estimate finish Sun Mar 10 16:57:03 2013 15.72% done, estimate finish Sun Mar 10 16:56:41 2013 17.03% done, estimate finish Sun Mar 10 16:56:22 2013 18.34% done, estimate finish Sun Mar 10 16:56:06 2013 19.65% done, estimate finish Sun Mar 10 16:55:52 2013 20.96% done, estimate finish Sun Mar 10 16:55:40 2013 22.27% done, estimate finish Sun Mar 10 16:55:29 2013 23.58% done, estimate finish Sun Mar 10 16:55:20 2013 24.89% done, estimate finish Sun Mar 10 16:55:12 2013 26.20% done, estimate finish Sun Mar 10 16:55:04 2013 27.51% done, estimate finish Sun Mar 10 16:54:57 2013 28.82% done, estimate finish Sun Mar 10 16:54:51 2013 30.13% done, estimate finish Sun Mar 10 16:54:45 2013 31.44% done, estimate finish Sun Mar 10 16:54:40 2013 32.75% done, estimate finish Sun Mar 10 16:54:35 2013 34.06% done, estimate finish Sun Mar 10 16:54:30 2013 35.37% done, estimate finish Sun Mar 10 16:54:26 2013 36.68% done, estimate finish Sun Mar 10 16:54:20 2013 37.99% done, estimate finish Sun Mar 10 16:54:19 2013 39.30% done, estimate finish Sun Mar 10 16:54:13 2013 40.61% done, estimate finish Sun Mar 10 16:54:10 2013 41.92% done, estimate finish Sun Mar 10 16:54:07 2013 43.22% done, estimate finish Sun Mar 10 16:54:04 2013 44.54% done, estimate finish Sun Mar 10 16:54:02 2013 45.84% done, estimate finish Sun Mar 10 16:54:00 2013 47.16% done, estimate finish Sun Mar 10 16:53:57 2013 48.46% done, estimate finish Sun Mar 10 16:53:55 2013 49.78% done, estimate finish Sun Mar 10 16:53:53 2013 51.08% done, estimate finish Sun Mar 10 16:53:51 2013 52.40% done, estimate finish Sun Mar 10 16:53:49 2013 53.70% done, estimate finish Sun Mar 10 16:53:48 2013 55.01% done, estimate finish Sun Mar 10 16:53:46 2013 56.32% done, estimate finish Sun Mar 10 16:53:45 2013 57.63% done, estimate finish Sun Mar 10 16:53:43 2013 58.94% done, estimate finish Sun Mar 10 16:53:42 2013 60.25% done, estimate finish Sun Mar 10 16:53:40 2013 61.56% done, estimate finish Sun Mar 10 16:53:39 2013 62.87% done, estimate finish Sun Mar 10 16:53:38 2013 64.18% done, estimate finish Sun Mar 10 16:53:36 2013 65.49% done, estimate finish Sun Mar 10 16:53:35 2013 66.80% done, estimate finish Sun Mar 10 16:53:33 2013 68.11% done, estimate finish Sun Mar 10 16:53:32 2013 69.42% done, estimate finish Sun Mar 10 16:53:31 2013 70.73% done, estimate finish Sun Mar 10 16:53:30 2013 72.04% done, estimate finish Sun Mar 10 16:53:29 2013 73.35% done, estimate finish Sun Mar 10 16:53:28 2013 74.66% done, estimate finish Sun Mar 10 16:53:27 2013 75.97% done, estimate finish Sun Mar 10 16:53:26 2013 77.28% done, estimate finish Sun Mar 10 16:53:25 2013 78.59% done, estimate finish Sun Mar 10 16:53:25 2013 79.90% done, estimate finish Sun Mar 10 16:53:24 2013 81.21% done, estimate finish Sun Mar 10 16:53:23 2013 82.52% done, estimate finish Sun Mar 10 16:53:22 2013 83.83% done, estimate finish Sun Mar 10 16:53:21 2013 85.14% done, estimate finish Sun Mar 10 16:53:20 2013 86.45% done, estimate finish Sun Mar 10 16:53:19 2013 87.76% done, estimate finish Sun Mar 10 16:53:19 2013 89.07% done, estimate finish Sun Mar 10 16:53:18 2013 90.38% done, estimate finish Sun Mar 10 16:53:18 2013 91.69% done, estimate finish Sun Mar 10 16:53:17 2013 93.00% done, estimate finish Sun Mar 10 16:53:16 2013 94.31% done, estimate finish Sun Mar 10 16:53:16 2013 95.62% done, estimate finish Sun Mar 10 16:53:15 2013 96.93% done, estimate finish Sun Mar 10 16:53:14 2013 98.24% done, estimate finish Sun Mar 10 16:53:14 2013 99.55% done, estimate finish Sun Mar 10 16:53:13 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 2.3x4390KBps /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