Hello,
I tried to burn data to rest of the blu ray disc, that failed and use speed=2.
At first it failed with original 25GB image, it was solved by excluding some files and burn only 24GB.
Executing 'builtin_dd if=mybluray-disc.udf of=/dev/sr0 obs=32k seek=0'
:-( /dev/sr0: 12088320 blocks are free, 12207031 to be written!
Output with speed=2 was at first same as in my original try with specified speed, zero data written, zero speed unknown remaining time
... but after some seconds the burner started to write the image. Until 8GB the speed varied between 1.0 and 1.5x, between 8GB and 24GB
it significantly dropped so average speed was 0.2x. Next try with new media and maybe different speed is needed to deduce some conclusion.
Executing 'builtin_dd if=mybluray-disc2.udf of=/dev/sr0 obs=32k seek=0'
/dev/sr0: "Current Write Speed" is 2.0x4390KBps.
0/24000000000 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU 0.0%
0/24000000000 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU 0.0%
0/24000000000 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU 0.0%
0/24000000000 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU 0.0%
0/24000000000 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU 0.0%
0/24000000000 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU 0.0%
0/24000000000 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU 0.0%
0/24000000000 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU 0.0%
0/24000000000 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU 0.0%
0/24000000000 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU 0.0%
0/24000000000 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU 0.0%
0/24000000000 ( 0.0%) @0x, remaining ??:?? RBU 100.0% UBU 0.0%
1769472/24000000000 ( 0.0%) @0.1x, remaining 10397:48 RBU 100.0% UBU 17.2%
1769472/24000000000 ( 0.0%) @0.0x, remaining 11301:58 RBU 100.0% UBU 100.0%
1769472/24000000000 ( 0.0%) @0.0x, remaining 11980:05 RBU 100.0% UBU 100.0%
2031616/24000000000 ( 0.0%) @0.0x, remaining 11024:46 RBU 100.0% UBU 100.0%
2031616/24000000000 ( 0.0%) @0.0x, remaining 11812:15 RBU 100.0% UBU 100.0%
2097152/24000000000 ( 0.0%) @0.0x, remaining 12015:14 RBU 100.0% UBU 100.0%
14286848/24000000000 ( 0.1%) @0.8x, remaining 1846:45 RBU 100.0% UBU 35.9%
30539776/24000000000 ( 0.1%) @1.1x, remaining 915:40 RBU 100.0% UBU 42.2%
46792704/24000000000 ( 0.2%) @1.1x, remaining 622:48 RBU 100.0% UBU 51.6%