Re: 2.2r3 test images
On 26 Apr 2001, Philip Hands wrote:
> Bernd Hentig <bernd@ixsoft.de> writes:
>
> > I'm only aware that the new CD-R 90/99 may pose some problems on
> > modern drives and that the CD-R 144/200 need a BIOS or even laser
> > upgrade to be read successfully. Maybe it's time for a Debian DVD
> > ;-) (yes, I will test this with debian-cd once I can get hold of a
> > DVD-R burner or compatible DVD-RW)
>
> Apparently making DVDs poses interesting problems because of the 2GB
> file size limit. I hear there is a solution, but didn't find out what
> it was.
mkisofs can split its output in 1GB chunks with -split-output. However the
question is if you actually want an iso9660 filesystem on a DVD, where the
"official" filesystem is UDF. Of course there's no problem in *UX, but I think
we want installation stuff (disks, docs) available on all possible other OSes,
too. And I don't know if, say, M$ products or MacOS <=9 can handle non-UDF
filesystems on DVDs. On the other hand, many older OSes can't handle UDF at
all...
And _if_ we wanted to have a UDF filesystem, there would be the issue of
creating that. AFAIK recent kernels have UDF read/write support, but only to
mounted partitions/loops which would require root rights for the CD builder
and of course the need to know the pretty-exact filesystem size in advance.
(In other words, there's no mkudffs similar to mkisofs.)
Also, there appear to be DVDs of anywhere between 2 and 8 GB in size, and some
drives/recorders only able to handle a subset, which makes it hard to decide
which size(s) we should support.
Regards,
Anne Bezemer
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