Mailinglist Archive: opensuse (1556 mails)

[Greg Freemyer <greg.freemyer@xxxxxxxxx>]

On Thu, Feb 4, 2010 at 5:54 AM, G T Smith
<grahamsmith@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
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> Greg Freemyer wrote:
> > On Wed, Feb 3, 2010 at 5:48 PM, Istvan Gabor <suseuser04@xxxxxxx> wrote:
> > > Hello:
> > >
> > > I have another question related to mounting CDs in linux.
> > > I have a CD that I burned years ago.
> > > If I mount it in openSUSE 11.2 the directory dates on the CD are all set to 
> > > '1970-01-01 01:00'. File dates look correct. But the directory dates look 
> > > correct in MS Windows. Why is this difference? How could I get the correct 
> > > directory dates in linux?
> > > (If I make an iso image from the CD using k3b, the directory dates are also 
> > > correct in the image.)
> > >
> > > Thanks,
> > > Istvan
> >
> > Good luck.  Sounds like a kernel bug of some sort.  Or it could have
> > been a bug in the tool you burned the CD in.
> >
> > Below is somewhat guess work.  CD layouts are not something I have
> > reviewed lately
> > ===
> > First you may want to know that a CD can have multiple filesystem
> > types simultaneously.  For instance I just looked at one that had both
> > Julian and ISO filesystem types.
> >
> > Thus a very old Win95 machine can read the ISO info and present it.
> > (8.3 style names etc.)
> >
> > Newer machines read the Julian info and present it.
> >
> > 1970-01-01 01:00 is likely the default date if the date field is left
> > zero filled.
> >
> > So maybe windows is seeing an unitialized date in the Julian
> > filesystem part of the CD and failing back to the ISO portion to get
> > it.  If so, is the bug in the tool you wrote with, or in the kernel
> > for not falling back to the ISO date.
> >
> > If you really want to troubleshoot it, the only tool I know to look at
> > the CD with is CD Inspector, but it is pretty expensive for what it
> > is:  http://www.infinadyne.com/cddvd_inspector.html
> >
> > Greg
>
> Hmmm...
>
> IIRC IS09660 covers the structure of data storage on the disk, and is
> distinct from Joliet or Rock Ridge which add metadata extensions which
> define file additional meta data information structures (I thought
> Julian was a calendar system). Filenames are retained in 8.3 DOS style
> format and remapped/renamed to table(s) containing additional info.
> Cannot remember at moment exact mechanism.
>
> This would suggest the Windows based extensions exist but the Linux
> based one do not on the original. K3b seems to be copying and converting.
>
> http://www.cdrfaq.org/faq.html
>
> Might give more info...

I defer to the man with greater knowledge.

Greg
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