Re: Can't read DVD
On Sun, Aug 25, 2013 at 07:06:04AM +0200, Martin S wrote: On Saturday, August 24, 2013 03:17:10 PM Doug wrote: I'm sure you are aware that there are some things that run in Wiondows that cant be run in Linux. This seems to be an example. That's why most of us who use Linux *most* of the time, have Windows machines. Umm, yes. As I used Linux exclusively for years untill a long desktop break untill recently I well know there are things that don't run in Linux. Reading DVDs (10 out of 12 faililng) never crossed my mind to be one of them. Have you checked if (or what) region code is set on the DVD drive of the linux box: https://en.wikipedia.org/wiki/DVD_region_code (or get around it)? Mihai -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: Can't read DVD
On Sun, 25 Aug 2013 07:06:04 +0200 Martin S shieldf...@gmail.com wrote: On Saturday, August 24, 2013 03:17:10 PM Doug wrote: On 08/24/2013 03:52 AM, Martin S wrote: I have a set of DVDs - about 6 years old - I wanted to check out what was on them. All but 1-2 produce input/output erros and can't be read. I opened them on my wifes Windows box, and they were read without any problems at all. Can you test with an external reader, attached to your Linux box\lappy. All rpmfusion* up to date? -- Regards, Frank When in doubt PANIC! I check for new mail app. 20min www.frankly3d.com -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Can't read DVD
I have a set of DVDs - about 6 years old - I wanted to check out what was on them. All but 1-2 produce input/output erros and can't be read. I opened them on my wifes Windows box, and they were read without any problems at all. In Dolphin it opens as empty. [mskjoldebrand@dragon K3b data project]$ ls ls: reading directory .: Input/output error [mskjoldebrand@dragon K3b data project]$ sudo tail -s 3 -f /var/log/messages Aug 24 09:48:11 dragon kernel: [11573.619129] iso9660: Corrupted directory entry in block 0 of inode 53504 Can something be done? /M -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: Can't read DVD
On 08/24/13 15:52, Martin S wrote: I have a set of DVDs - about 6 years old - I wanted to check out what was on them. All but 1-2 produce input/output erros and can't be read. I opened them on my wifes Windows box, and they were read without any problems at all. In Dolphin it opens as empty. [mskjoldebrand@dragon K3b data project]$ ls ls: reading directory .: Input/output error [mskjoldebrand@dragon K3b data project]$ sudo tail -s 3 -f /var/log/messages Aug 24 09:48:11 dragon kernel: [11573.619129] iso9660: Corrupted directory entry in block 0 of inode 53504 Can something be done? Are the DVDs commercially produced or were they written on DVD∓R or DVD∓RW media? I have experienced many cases with non-commercially produced DVDs would be readable in one drive and non-readable in another and it wasn't O/S dependent. -- Getting tired of non-Fedora discussions and self-serving posts -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: Can't read DVD
On 08/24/2013 03:03 AM, Ed Greshko wrote: On 08/24/13 15:52, Martin S wrote: I have a set of DVDs - about 6 years old - I wanted to check out what was on them. All but 1-2 produce input/output erros and can't be read. I opened them on my wifes Windows box, and they were read without any problems at all. In Dolphin it opens as empty. [mskjoldebrand@dragon K3b data project]$ ls ls: reading directory .: Input/output error [mskjoldebrand@dragon K3b data project]$ sudo tail -s 3 -f /var/log/messages Aug 24 09:48:11 dragon kernel: [11573.619129] iso9660: Corrupted directory entry in block 0 of inode 53504 Can something be done? Are the DVDs commercially produced or were they written on DVD∓R or DVD∓RW media? I have experienced many cases with non-commercially produced DVDs would be readable in one drive and non-readable in another and it wasn't O/S dependent. in addition, with a dvd that give errors, try; dd if=/dev/sr0 of=/dev/null if you get errors, put an old cd of about same age in drive, repeat above command to see it you get errors. if you get errors only with dvd's, drive may be going bad. dvd ability usually goes first. and, usually inner tracks tend to show bad first. compact disk are not best archival media as they will/may/can go bad after a long time. especially ∓RW. hold bad dvd's up with a light behind them to see if you have 'bright spots'. hold burn side up at an angle to light. see any unusual reflection? badly marred or scratched areas? something very surprising, years ago, someone i know had a commercial music cd that when you held it up to a light, it looked like a sieve, but played without anything noticeable. but that is slow speed audio and ear, not high speed data, or an o-scope display. :=) another problem is head may/could/might be at an opposite side of +/- tolerance of alignment from head that dvd's where written with. if you can get access to a new or fairly new drive, swap it out with one you have to see if drive is going bad. -- peace out. in a world with out fences, who needs gates. sl6.3 linux tc.hago. g . -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: Can't read DVD
On Saturday, August 24, 2013 04:35:36 AM g wrote: On 08/24/2013 03:03 AM, Ed Greshko wrote: On 08/24/13 15:52, Martin S wrote: I have a set of DVDs - about 6 years old - I wanted to check out what was on them. All but 1-2 produce input/output erros and can't be read. I opened them on my wifes Windows box, and they were read without any problems at all. In Dolphin it opens as empty. [mskjoldebrand@dragon K3b data project]$ ls ls: reading directory .: Input/output error [mskjoldebrand@dragon K3b data project]$ sudo tail -s 3 -f /var/log/messages Aug 24 09:48:11 dragon kernel: [11573.619129] iso9660: Corrupted directory entry in block 0 of inode 53504 Can something be done? Are the DVDs commercially produced or were they written on DVD∓R or DVD∓RW media? I have experienced many cases with non-commercially produced DVDs would be readable in one drive and non-readable in another and it wasn't O/S dependent. in addition, with a dvd that give errors, try; dd if=/dev/sr0 of=/dev/null Aye I know about non-factory discs but I thought 2 out of 10 or 12 was a bit excessive. I ran that command without errors (expected, the laptop is only a few months old) but I'll go look at them as you say =) /M. -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: Can't read DVD
Allegedly, on or about 24 August 2013, g sent: something very surprising, years ago, someone i know had a commercial music cd that when you held it up to a light, it looked like a sieve, but played without anything noticeable. Back when I was young, and dinosaurs roamed the earth, audio CDs came out as a brand new thing. Just about any that I looked at, in the same way, had that same look to them, and they all played fine. What we can see of the disc is nothing compared to how the laser read the disc, both in the microscopic size of the pits (that we can't see with our naked eyes), and how it automatically compensates for random small missing bits of data *scattered* throughout the stream - it's not a huge chunk of consecutive data being lost. On that note, it always amazed me that data CDs were ever possible. For a start, you can't just lose a bit in your data (or program) and carry on as if nothing happened, it all has to be precisely correct, and audio CDs are continually working through playback errors, all the time the disc is playing. Checksums can say the data is wrong, but if there's more than one bit wrong, you couldn't work out what the error actually was. With audio, you can make a guess, to fit a missing value between the two adjacent surviving values, but computing data doesn't have that sort of relationship with adjacent data. Storing the data more than once, as the old C64 floppy disc drives supposedly did, is an approach that lets you read a corrupted disc, so long as at least one copy of the data survived, but that halves your data storage size, and data CDs didn't do that. -- [tim@localhost ~]$ uname -rsvp Linux 3.9.10-100.fc17.x86_64 #1 SMP Sun Jul 14 01:31:27 UTC 2013 x86_64 All mail to my mailbox is automatically deleted, there is no point trying to privately email me, I will only read messages posted to the public lists. George Orwell's '1984' was supposed to be a warning against tyranny, not a set of instructions for supposedly democratic governments. -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: Can't read DVD
Allegedly, on or about 24 August 2013, Martin S sent: the laptop is only a few months old The laptop is the one with the disc reading problem? It might be just a case of cleaning the reader. Laptop drives are notorious for exposing the laser mechanism to contamination. It takes more effort to get muck into a desktop's drive, as only the tray pops out to the outside world. Being brand new is no guarantee that the device is in excellent working order. When discs work on one device, but not another, it tends to point the finger at the device. It may be faulty, it may be less tolerant of out-of-spec media, the media may just be less compatible, the media may just be plain awful and a really good drive disguised that from you. On that last note, a lot of media is just awful. Since a large number of people just buy the cheapest that they can get, manufacturers are more than happy enough to sell shoddy goods. When I first started working with optical media, I tried a variety out, and quite a lot of it was marginal, a few outright crap, and a few really noticeably good. The quick tests were how long it took the computer to start working with a disc just inserted. Those that spent ages going whiz-whir, trying to read the disc, were obviously crapper than when a disc almost immediately starts doing its job. Longer tests were things like discs that failed in the middle of doing a burn of the whole disc (quite a few would do that). And even longer tests were whether the disc was still use good months, or years, later. Quite a few were not. I'm not going to name and shame, because my tests relate to my equipment, it was a long time ago, and I wouldn't want the repercussions of disgruntled companies. I will do the opposite, Verbatim have been the best discs that I've used, for probably somewhere around a decade of doing CDs or DVDs, I've only had a few random failures, and one spindle of discs that obviously were a bad batch. With a few other brands, I've seen 20-30% failure rates, and people seem willing to accept that, despite how that can be a catastrophic loss of data only discovered too late, rather than it simply being a fail while burning that will be redone on another disc in a few minutes. -- [tim@localhost ~]$ uname -rsvp Linux 3.9.10-100.fc17.x86_64 #1 SMP Sun Jul 14 01:31:27 UTC 2013 x86_64 All mail to my mailbox is automatically deleted, there is no point trying to privately email me, I will only read messages posted to the public lists. George Orwell's '1984' was supposed to be a warning against tyranny, not a set of instructions for supposedly democratic governments. -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: Can't read DVD
On 08/24/2013 08:06 AM, Martin S wrote: Aye I know about non-factory discs but I thought 2 out of 10 or 12 was a bit excessive. I ran that command without errors (expected, the laptop is only a few months old) but I'll go look at them as you say =) i do not know it there is a 'rule of thumb' for a defective cd/dvd, but i imagine the mfg's have a lot of info on them. i only know of what i have experienced. as an over all; new: bad a cd/dvd shows up less. defect is for entire stack, sometimes it will be a low 10 to 20 percent. some times more/less. bad show in inner tracks, during burn verify. bad show during initialization of id track. most often happens with cd/dvd from non manufacture branded, ie, radio shack, office depot, etc. from cd/dvd makers is rare. old: sometimes it will be a low 10 to 20 percent. some times more/less. bad show in inner tracks, bad show during read of id track. most often happens with cd/dvd from non manufacture branded, ie, radio shack, office depot, etc. from cd/dvd makers is less. causes for bad old: defect is for a group of a stack. bad show in inner tracks. bad show during read of id track. most often happens with cd/dvd from non manufacture branded, ie, radio shack, office depot, etc. cd/dvd errors happen from 'holes'. bad scratches, can be recover some times buffing, some places offer service. older they get, worse the errors. sticking with well know coating brands, tho any can have bad runs. i would guess reputable creators destroy by lots, some may pass off to off brand labelers. drives: bad can happen from drive going bad. show start with dvd's, progresses to cd's. bad drive starts during burns, progresses to reads. bad drives with read errors starts with burn read errors. commercials check as good. progresses to commercial. some times using different burn programs works. possible because of checking routines and failure rate. some read routines may allow for accumulation of reads to 'rebuild' data. number of reads to build varies. i do not keep records for such, % is guesstimate, just recalling from memory. ymmv. ikmd. -- peace out. in a world with out fences, who needs gates. sl6.3 linux tc.hago. g . -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: Can't read DVD
On Sun, 25 Aug 2013, Tim wrote: On that note, it always amazed me that data CDs were ever possible. For a start, you can't just lose a bit in your data (or program) and carry on as if nothing happened, it all has to be precisely correct, and audio CDs are continually working through playback errors, all the time the disc is playing. Checksums can say the data is wrong, but if there's more than one bit wrong, you couldn't work out what the error actually was. With audio, you can make a guess, to fit a missing value between They work because the error-correcting code is much better than that. -- Michael henne...@web.cs.ndsu.nodak.edu On Monday, I'm gonna have to tell my kindergarten class, whom I teach not to run with scissors, that my fiance ran me through with a broadsword. -- Lily -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: Can't read DVD
On 08/24/2013 03:52 AM, Martin S wrote: I have a set of DVDs - about 6 years old - I wanted to check out what was on them. All but 1-2 produce input/output erros and can't be read. I opened them on my wifes Windows box, and they were read without any problems at all. /snip/ Can something be done? /M I don't mean to be a wise guy, but you wanted to see what was on them, and you opened them in Windows. Now you know. I'm sure you are aware that there are some things that run in Wiondows that cant be run in Linux. This seems to be an example. That's why most of us who use Linux *most* of the time, have Windows machines. --doug -- Blessed are the peacemakers..for they shall be shot at from both sides. --A.M.Greeley -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: Can't read DVD
On 08/24/2013 03:17 PM, Doug wrote: On 08/24/2013 03:52 AM, Martin S wrote: I have a set of DVDs - about 6 years old - I wanted to check out what was on them. All but 1-2 produce input/output erros and can't be read. I opened them on my wifes Windows box, and they were read without any problems at all. /snip/ Can something be done? /M I don't mean to be a wise guy, but you wanted to see what was on them, and you opened them in Windows. Now you know. I'm sure you are aware that there are some things that run in Wiondows that cant be run in Linux. This seems to be an example. That's why most of us who use Linux *most* of the time, have Windows machines. --doug -- Blessed are the peacemakers..for they shall be shot at from both sides. --A.M.Greeley Or at least a Windows virtual machine. -- _ °v° /(_)\ ^ ^ Mark LaPierre Registered Linux user No #267004 https://linuxcounter.net/ -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: Can't read DVD
On Sun, 2013-08-25 at 01:08 +0930, Tim wrote: On that note, it always amazed me that data CDs were ever possible. For a start, you can't just lose a bit in your data (or program) and carry on as if nothing happened, it all has to be precisely correct, and audio CDs are continually working through playback errors, all the time the disc is playing. Checksums can say the data is wrong, but if there's more than one bit wrong, you couldn't work out what the error actually was. If it were a simple checksum I'd agree, but in fact they use Reed-Solomon Error Correcting Codes (ECC) which can typically correct burst errors of up to 4000 bits or so essentially on the fly. See http://en.wikipedia.org/wiki/Reed%E2%80%93Solomon_error_correction Still pretty amazing though. poc -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: Can't read DVD
On Saturday, August 24, 2013 03:17:10 PM Doug wrote: On 08/24/2013 03:52 AM, Martin S wrote: I have a set of DVDs - about 6 years old - I wanted to check out what was on them. All but 1-2 produce input/output erros and can't be read. I opened them on my wifes Windows box, and they were read without any problems at all. /snip/ Can something be done? /M I don't mean to be a wise guy, but you wanted to see what was on them, and you opened them in Windows. Now you know. You kindof failed. I'm sure you are aware that there are some things that run in Wiondows that cant be run in Linux. This seems to be an example. That's why most of us who use Linux *most* of the time, have Windows machines. Umm, yes. As I used Linux exclusively for years untill a long desktop break untill recently I well know there are things that don't run in Linux. Reading DVDs (10 out of 12 faililng) never crossed my mind to be one of them. /M. -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
