DVD-RAM beschreiben

[koala4444]

Hi!

Wenn ich versuche, eine mit UDF formatierte DVD-RAM zu beschreiben (openSuse10.3) bekomme ich diese Meldung:

mm@linux1:~> su
Passwort:
linux1:/home/mm # mkdir /media/LinuxUDF/Verzeichnis
mkdir: kann Verzeichnis „/media/LinuxUDF/Verzeichnis“ nicht anlegen: Das Dateisystem ist nur lesbar

so funktioniert es:

pktsetup dvdram /dev/sr0
mount -t udf /dev/pktcdvd/dvdram /media/dvdram -o rw,noatime,async,users

Sollte das nicht automatisch ohne pktcdvd funktionieren?
In der Kerneldocumentation (Documentation/filesystems/udf.txt) habe ich das gefunden:

Write support requires a block driver which supports writing. Currently
dvd+rw drives and media support true random sector writes, and so a udf
filesystem on such devices can be directly mounted read/write. CD-RW
media however, does not support this. Instead the media can be formatted
for packet mode using the utility cdrwtool, then the pktcdvd driver can
be bound to the underlying cd device to provide the required buffering
and read-modify-write cycles to allow the filesystem random sector writes
while providing the hardware with only full packet writes. While not
required for dvd+rw media, use of the pktcdvd driver often enhances
performance due to very poor read-modify-write support supplied internally
by drive firmware.