[ILUG] UDF and DVDs

[Lars Hecking]

 Has anyone managed to write a DVD with a UDF filesystem on Linux?

 I am ultimately trying to create a DVD with files on it larger than
 2GB. ISO9660 doesn't support this.

 I've got this working with ext2, but the downside is that the DVD can be
 read on Linux only (yes, I have heard of ext2fs for 'doze ...).

 This is on RHEL3 with kernel 2.4.21 (includes rw support for UDF). I have
 tried two different options. A file with UDF filesystem was created, mounted
 via loopback, files copied over, unmount, then tried to write it with dd and
 growisofs. The errors were:

# growisofs -overburn -Z /dev/scd1=dvdfile.img
Executing 'builtin_dd if=dvdfile.img of=/dev/scd1 obs=32k seek=0'
:-( /dev/scd1: 2295104 blocks are free, 2298368 to be written!
:-! ignoring...
/dev/scd1: "Current Write Speed" is 6.1x1385KBps.
         0/4700372992 ( 0.0%) @0x, remaining ??:??
         0/4700372992 ( 0.0%) @0x, remaining ??:??
         0/4700372992 ( 0.0%) @0x, remaining ??:??
         0/4700372992 ( 0.0%) @0x, remaining ??:??
         0/4700372992 ( 0.0%) @0x, remaining ??:??
         0/4700372992 ( 0.0%) @0x, remaining ??:??
         0/4700372992 ( 0.0%) @0x, remaining ??:??
         0/4700372992 ( 0.0%) @0x, remaining ??:??
         0/4700372992 ( 0.0%) @0x, remaining ??:??
         0/4700372992 ( 0.0%) @0x, remaining ??:??
:-[ WRITE at LBA=40000000h failed with SK=2h/ASC=04h/ACQ=07h]: No medium found
:-( write failed: No medium found

 Try dd:

# dd if=dvdfile.img of=/dev/scd1 obs=32k seek=0 dd: opening `/dev/scd1': Read-only file system

 In both cases, a fresh, unused medium was present.

 Another thing I've tried is pktsetup from the udftools package, but I'm not
 sure this kernel supports packets for block devices, and there is no patch
 to be downloaded at http://packet-cd.sourceforge.net/.

# pktsetup /dev/pktcdvd0 /dev/scd1
ioctl: Inappropriate ioctl for device
# ll /dev/pktcdvd0
----------    1 root     root            0 Oct 23 13:05 /dev/pktcdvd0
# mkudffs /dev/pktcdvd0
trying to change type of multiple extents
#

 Any ideas?