Recovering data from duff CDROM ?
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From: Pascal Hambourg on 3 Nov 2009 16:43 Doug Mitton a �crit : > >>> http://users.elis.ugent.be/~mronsse/cdfs/ > > I use it to recover data from a muti-session data > disk that has had a newer session write "junk" over a previous "good" > session. Isn't it overkill for this purpose ? You can select the session number in the mount options when mounting a multisession CD-ROM the usual way.
From: Mike Jones on 3 Nov 2009 18:09 Responding to jellybean stonerfish: > On Tue, 03 Nov 2009 19:46:19 +0000, Mike Jones wrote: > >> I'm thinking this disk is a write off though, including the data on it. > > What happened when you tried ddrescue? Not got there yet. Just finished all the "try it in this machine, and now this drive..." stuff. Next up, the software options. I did find another CDROM, same batch, with more data on it, that has the same (I assume, by it's errors) problem. I'm seeing a pattern. something, some day, was barfing up disks. The strange thing is, they must have worked back then, as I always check every burn to make sure it "stuck". There may have been a reason they were so cheap. >:( -- *===( http://www.400monkeys.com/God/ *===( http://principiadiscordia.com/ *===( http://www.slackware.com/
From: Mike Jones on 3 Nov 2009 18:10 Responding to Pascal Hambourg: > Doug Mitton a écrit : >> >>>> http://users.elis.ugent.be/~mronsse/cdfs/ >> >> I use it to recover data from a muti-session data disk that has had a >> newer session write "junk" over a previous "good" session. > > Isn't it overkill for this purpose ? You can select the session number > in the mount options when mounting a multisession CD-ROM the usual way. I'll settle for a massacre if it gets this data back. ;\ -- *===( http://www.400monkeys.com/God/ *===( http://principiadiscordia.com/ *===( http://www.slackware.com/
From: Unruh on 3 Nov 2009 18:15 Mike Jones <Not(a)Arizona.Bay> writes: >Responding to Doug Mitton: >> Mike Jones <Not(a)Arizona.Bay> wrote: >> >>>Responding to philo: >>> >>>> Mike Jones wrote: >>>>> Responding to philo: >>>>> >>>>>> Mike Jones wrote: >>>>>>> I burned a CDROM a short while back, and now can't get the damn >>>>>>> thing to mount (even though it would have been checked as OK prior >>>>>>> to storage). As its got data on it that is no longer available from >>>>>>> source, I'm wondering if anybody has any favorite tricks they've >>>>>>> used to force a mount. >>>>>>> >>>>>>> Its a cheapo Memorex thing from some supermarket, and the data was >>>>>>> originally on an ext2 file system. The data is a collection of MP3 >>>>>>> lectures, and was burned as data (not as an audioCD) to this CDROM >>>>>>> using Brasero on a Zenwalk-5.2 OS. >>>>>>> >>>>>>> I've tried the usual "auto" and "ext2" mount options, and the "-s" >>>>>>> sloppy mount flag, but the best I can manage is a lot of disk >>>>>>> spinning, followed by a report that the resource is read only (its >>>>>>> not) and a mount screen report about "No such file or directory" >>>>>>> available. >>>>>>> >>>>>>> Just to be sure I'd actually managed a burn in the first place, I >>>>>>> dropped the disk into a burn process in XFburn (the app I'm >>>>>>> currently using on Slackware) and, as expected, got a report that >>>>>>> the CDROM disk was full. >>>>>>> >>>>>>> There is no visible evidence of damage on the disk itself. Its >>>>>>> shiney new. >>>>>>> >>>>>>> I'm open to suggestions about now. Clues anyone? >>>>>>> >>>>>>> >>>>>>> >>>>>> try it on another machine >>>>> >>>>> >>>>> Done that already. >>>>> >>>>> >>>>> >>>>> >>>> >>>> there's a windows utility call iso buster that I've used with good >>>> results. don't know if there is a Linux equiv >>> >>> >>>Doubtless. It might be a combination of things called in one commandline >>>though. I guess I'm going to end up learning it. ;\ >> >> I've used CDFS to rescue a friends photos in the past. It doesn't >> appear to be supported recently but its located: >> http://users.elis.ugent.be/~mronsse/cdfs/ >> >> Good luck! >Another useful looking tool that relies on something actually booting in >some way. I have no idea what you mean by "booting" It is not an operating system disk. It is simply a disk full of files. Did you mean "mounting" rather than "booting"? What error messages do you get when you try to mount it? What did you use to write the data to the disk? Is it and ISO 9660 filesystem? Can it be read at all? You might try doing dd on it to get the data onto a file on your system. dd -if /dev/sdb -of dvd-contents.iso >There does seem to be a few options to look at though. Cheers. >I'm thinking this disk is a write off though, including the data on it.
From: Mike Jones on 4 Nov 2009 06:14
Responding to Unruh: > Mike Jones <Not(a)Arizona.Bay> writes: > >>Responding to Doug Mitton: > >>> Mike Jones <Not(a)Arizona.Bay> wrote: >>> >>>>Responding to philo: >>>> >>>>> Mike Jones wrote: >>>>>> Responding to philo: >>>>>> >>>>>>> Mike Jones wrote: >>>>>>>> I burned a CDROM a short while back, and now can't get the damn >>>>>>>> thing to mount (even though it would have been checked as OK >>>>>>>> prior to storage). As its got data on it that is no longer >>>>>>>> available from source, I'm wondering if anybody has any favorite >>>>>>>> tricks they've used to force a mount. >>>>>>>> >>>>>>>> Its a cheapo Memorex thing from some supermarket, and the data >>>>>>>> was originally on an ext2 file system. The data is a collection >>>>>>>> of MP3 lectures, and was burned as data (not as an audioCD) to >>>>>>>> this CDROM using Brasero on a Zenwalk-5.2 OS. >>>>>>>> >>>>>>>> I've tried the usual "auto" and "ext2" mount options, and the >>>>>>>> "-s" sloppy mount flag, but the best I can manage is a lot of >>>>>>>> disk spinning, followed by a report that the resource is read >>>>>>>> only (its not) and a mount screen report about "No such file or >>>>>>>> directory" available. >>>>>>>> >>>>>>>> Just to be sure I'd actually managed a burn in the first place, I >>>>>>>> dropped the disk into a burn process in XFburn (the app I'm >>>>>>>> currently using on Slackware) and, as expected, got a report that >>>>>>>> the CDROM disk was full. >>>>>>>> >>>>>>>> There is no visible evidence of damage on the disk itself. Its >>>>>>>> shiney new. >>>>>>>> >>>>>>>> I'm open to suggestions about now. Clues anyone? >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>> try it on another machine >>>>>> >>>>>> >>>>>> Done that already. >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>> there's a windows utility call iso buster that I've used with good >>>>> results. don't know if there is a Linux equiv >>>> >>>> >>>>Doubtless. It might be a combination of things called in one >>>>commandline though. I guess I'm going to end up learning it. ;\ >>> >>> I've used CDFS to rescue a friends photos in the past. It doesn't >>> appear to be supported recently but its located: >>> http://users.elis.ugent.be/~mronsse/cdfs/ >>> >>> Good luck! > > >>Another useful looking tool that relies on something actually booting in >>some way. > > I have no idea what you mean by "booting" It is not an operating system > disk. It is simply a disk full of files. Did you mean "mounting" rather > than "booting"? > What error messages do you get when you try to mount it? What did you > use to write the data to the disk? Is it and ISO 9660 filesystem? > > Can it be read at all? You might try doing dd on it to get the data onto > a file on your system. > > dd -if /dev/sdb -of dvd-contents.iso Oops! My bad. I did indeed mean "mounting". (Playing with multiple projects can suffer terminology cross-over.) So far I can't get anything to read the disk at all. No mounts work, and #-> dd if=/dev/hda of=/tmp/disk.out dd: reading `/dev/hda': Input/output error 0+0 records in 0+0 records out 0 bytes (0 B) copied, 1.39585 s, 0.0 kB/s ....is about as far as I've got with this disk. -- *===( http://www.400monkeys.com/God/ *===( http://principiadiscordia.com/ *===( http://www.slackware.com/ |