Recovering data from duff CDROM ?
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From: Mike Jones on 2 Nov 2009 06:08 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? -- *===( http://www.400monkeys.com/God/ *===( http://principiadiscordia.com/ *===( http://www.slackware.com/
From: philo on 2 Nov 2009 07:59 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
From: bb on 2 Nov 2009 08:07 On 2009-11-02 12:08, 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? > The filesystem on your cdrom is not ext2, it's probably iso9660. Try to read from the cdrom device, with dd or mk5sum and see if you get errors. There is a tool named ddrescue that can continue to read even if you get block errors, and if you save it to a file, and once you have the file, try to play it with mplayer to see if there is any hope at all to get the mp3 files back. /bb
From: Bit Twister on 2 Nov 2009 09:06 On Mon, 02 Nov 2009 11:08:10 GMT, 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. Just for fun, try mount -t auto /dev/xxxx /some_mount_point_here
From: Mike Jones on 2 Nov 2009 10:19
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. -- *===( http://www.400monkeys.com/God/ *===( http://principiadiscordia.com/ *===( http://www.slackware.com/ |