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Re: [Cdw-devel] Bugs prior to 0.5 release
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From: <cdw...@li...> - 2010-07-15 20:34:45
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Dnia 15-07-2010 o godz. 1:12 cdw...@li... napisał(a): > 14) Time Time Until Completion dialog doesn't seem correct with growisofs. > I know a 3.2M file doesn't take this long to write. And then I see ETA > jump down > from 34 minutes to approximately 5 minutes (guessing) during the writing. > > It seems cdw_growisofs_pr_handle_writing_data is reporting inflated times. cdw_growisofs_pr_handle_writing_data() only processes output of growisofs, including "remaining XX:YY" information. If there is any inflating, it's growisofs' fault :) > When I execute growisofs via command line, I get none of these inflated > values > with a very small /tmp/tmp.iso (2M). Growisofs via command line shows: > growisofs -dvd-compat -Z /dev/dvdrw=/tmp/tmp.iso > > And the write session was completed within a few minutes -- but > growisofs didn't > show any ETA times, only an initial ???. > > After trying to run the same growisofs command but with time, I get the > long > delay now. I can't explain this behavior :( Maybe it depends on whether you burn ISO image to DVD, or you burn regular files to DVD. In the second case growisofs has to wait for data stream mkisofs (mkisofs creates ISO file system piped into growisofs' stdin). If there is some delay from mkisofs, growisofs displays longer ETA times. This wouldn't be the case with burning ISO file - ISO file system is already created. > > Matter of fact, I'm seeing likely a kernel bug here: > > Jul 14 14:49:29 [kernel] sr 1:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 > 00 00 00 02 00 > Jul 14 14:49:29 [kernel] end_request: I/O error, dev sr0, sector 0 > [...] > This seems to be causing the long delay at times when writing -- this > could be > either the media becoming unwritable (RW media) or other error -- or > growisofs > could be doing a automatic erase?? > > Executing 'builtin_dd if=/tmp/tmp.iso of=/dev/dvdrw obs=32k seek=0' > /dev/dvdrw: "Current Write Speed" is 2.5x1352KBps. > 0/3330048 ( 0.0%) @0x, remaining ??:?? RBU 10.0% UBU 0.0% > 0/3330048 ( 0.0%) @0x, remaining ??:?? RBU 10.0% UBU 0.0% > 0/3330048 ( 0.0%) @0x, remaining ??:?? RBU 10.0% UBU 0.0% > 0/3330048 ( 0.0%) @0x, remaining ??:?? RBU 10.0% UBU 0.0% > 0/3330048 ( 0.0%) @0x, remaining ??:?? RBU 10.0% UBU 0.0% > 0/3330048 ( 0.0%) @0x, remaining ??:?? RBU 10.0% UBU 0.0% > 32768/3330048 ( 1.0%) @0.0x, remaining 40:15 RBU 9.9% UBU 100.0% > 32768/3330048 ( 1.0%) @0.0x, remaining 45:16 RBU 9.9% UBU 100.0% > 32768/3330048 ( 1.0%) @0.0x, remaining 50:18 RBU 9.9% UBU 100.0% > 65536/3330048 ( 2.0%) @0.0x, remaining 28:13 RBU 9.8% UBU 100.0% > ...snip... > > > Oh Wow. This is turning out to be an extremely long write session this > time! > This is starting to appear more like a growisofs issue or even bug. Or > even > undocumented kernel bug? <shrugs> I would say that this is a problem with DVD+RW, but this is just guessing. When it comes to kernel stuff I'm a layman. > > > syslog is dumping this: > > 14 15:04:30 [kernel] sr 1:0:0:0: [sr0] Unhandled sense code > Jul 14 15:04:30 [kernel] sr 1:0:0:0: [sr0] Result: hostbyte=DID_OK > driverbyte=DRIVER_SENSE > Jul 14 15:04:30 [kernel] sr 1:0:0:0: [sr0] Sense Key : Medium Error > [current] > Jul 14 15:04:30 [kernel] sr 1:0:0:0: [sr0] Add. Sense: L-EC > uncorrectable error > Jul 14 15:04:30 [kernel] sr 1:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 > 00 00 00 02 00 > Jul 14 15:04:30 [kernel] end_request: I/O error, dev sr0, sector 0 > Jul 14 15:04:30 [kernel] Buffer I/O error on device sr0, logical block 0 > Jul 14 15:04:40 [kernel] sr 1:0:0:0: [sr0] Unhandled sense code > Jul 14 15:04:40 [kernel] sr 1:0:0:0: [sr0] Result: hostbyte=DID_OK > driverbyte=DRIVER_SENSE > Jul 14 15:04:40 [kernel] sr 1:0:0:0: [sr0] Sense Key : Medium Error > [current] > Jul 14 15:04:40 [kernel] sr 1:0:0:0: [sr0] Add. Sense: L-EC > uncorrectable error > Jul 14 15:04:40 [kernel] sr 1:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 > 00 00 00 02 00 > Jul 14 15:04:40 [kernel] end_request: I/O error, dev sr0, sector 0 > Jul 14 15:04:40 [kernel] Buffer I/O error on device sr0, logical block 0 > > > Seems like redundant duplicate errors, including the last error. > > At this point, I just usually toss the RW media -- seems it only lasts > sometimes a few writes. :-/ > > Or am I dumb and not realizing something??? I know that DVD+RW discs shouldn't be blanked too much times. Did you blank your DVD+RW frequently? Kind regards, Kamil |
