Re: DVD rescue: Rescued data in mapfile goes past end of input file ?
Le vendredi 12 avril 2024, 18:14:09 CEST Christian Franke a écrit : > Antonio Diaz Diaz wrote: > > Hello Fab, > > > > Fab Stz wrote: > >> I have this error message: > >> > >> Rescued data in mapfile goes past end of input file. > >> Use '-C' if you are reading from a partial copy. > > > > This means that the first DVD reader reported a size larger than the > > second DVD reader did. Maybe the first reader rescued the two lead out > > sectors at the end of the DVD, and the second reader does not > > recognize them as part of the input. See > > http://www.gnu.org/software/ddrescue/manual/ddrescue_manual.html#Optical-m > > edia > Other differences might occur if a rewritable DVD is used: lseek(fd, 0, > SEEK_END) might return the full recordable size if a DVD recorder is > used, but not if a reader is used. This might also depend on operating > system. Thank you. One of the device has DVD writer capability, while the other can only read the IIRC. So that may explain it. Regards Fab
Re: DVD rescue: Rescued data in mapfile goes past end of input file ?
Antonio Diaz Diaz wrote: Hello Fab, Fab Stz wrote: I have this error message: Rescued data in mapfile goes past end of input file. Use '-C' if you are reading from a partial copy. This means that the first DVD reader reported a size larger than the second DVD reader did. Maybe the first reader rescued the two lead out sectors at the end of the DVD, and the second reader does not recognize them as part of the input. See http://www.gnu.org/software/ddrescue/manual/ddrescue_manual.html#Optical-media Other differences might occur if a rewritable DVD is used: lseek(fd, 0, SEEK_END) might return the full recordable size if a DVD recorder is used, but not if a reader is used. This might also depend on operating system. -- Regards, Christian
Re: DVD rescue: Rescued data in mapfile goes past end of input file ?
Hello Fab, Fab Stz wrote: I have this error message: Rescued data in mapfile goes past end of input file. Use '-C' if you are reading from a partial copy. This means that the first DVD reader reported a size larger than the second DVD reader did. Maybe the first reader rescued the two lead out sectors at the end of the DVD, and the second reader does not recognize them as part of the input. See http://www.gnu.org/software/ddrescue/manual/ddrescue_manual.html#Optical-media Ddrescue complains because the sizes do not match. This is to prevent accidentally overwriting an image with unrelated data from the wrong input device. If you are sure that the DVD is the same, just give ddrescue the option -C so that it can try to fill the gaps. Best regards, Antonio.
