On 2016-11-25 07:00:11 Baron wrote:
> Hi Leslie
>
> On Friday 25 November 2016 11:04:46 Leslie Turriff wrote:
> > On 2016-11-21 17:35:21 deloptes wrote:
> > > Baron wrote:
> > > > Hi All,
> > > >
> > > > On Sunday 20 November 2016 23:43:03 deloptes wrote:
> > > >> I've not worked with cd/DVD file systems for many years now,
> > > >> bu I think there was extention to overcome such limitation. I
> > > >> would try to create iso image first and inspect  it via loop
> > > >> mount.
> > > >>
> > > >> regards
> > > >
> > > > Using K3B produces a DVD with a single directory with all the
> > > > files and sub directories intact.  So from that point of view
> > > > the data has been backed up, but unfortunately where the files
> > > > have come from is lost.  So unless I create an included note of
> > > > where they come from, I can't put the data back into the right
> > > > place.
> > > >
> > > > Thanks:
> > >
> > > The best way to back up is using tar anyway. Is it not an option?
> > > If you wish to have directories, you may need to read about the
> > > ISO9660 format
> > >
> > > https://en.wikipedia.org/wiki/Universal_Disk_Format
>
> Thank you for this link.  Very informative.  There is a lot there that
> I simply had no idea about.
>
> > > depends on the data you copy to the dvd it might render unusable
> > > if you would expect it to behave as data on a normal filesystem
> >
> > 	You might also want to take a look at dar.
>
> Yes I will do that, again I've never heard of "dar"
	From info dar (http://dar.linux.free.fr/):

       dar  is  a full featured backup tool, aimed for disks (floppy, CD-R(W),
       DVD-R(W), zip, jazz, etc.) and since release 2.4.0 adapted to tapes.

       dar can store a backup in several files (called "slices" in the follow-
       ing)  of  a  given  size,  eventually  pausing  or  running a user com-
       mand/script before starting the next slice. This can allow for example,
       the burning of the last generated slice on a CD-R, or changing a floppy
       disk before continuing on the next one.  Like  its  grand-brother,  the
       great  "tar"  command,  dar may also use compression, at the difference
       that compression is used inside the archive to be  able  to  have  com-
       pressed  slices  of the defined size. But the most important feature of
       dar is its ability to make differential backups. In other words,  back-
       ups  that  contain  only  new  files  or files that have changed from a
       backup of reference.   Moreover  with  differential  backup,  dar  also
       stores  files  that  have  been  deleted since the backup of reference.
       Thus, when restoring, first a full backup, then additional differential
       backups,  at each restoration you get the exact state of the filesystem
       at the time of the backup. And of course, the reference backup may be a
       full or a differential backup itself.

dar also can make encrypted backups.
> > Leslie