Re: Recursive copy to udf-formatted dvd-ram freezes system

[Johannes Wiedersich <johannes@physik.blm.tu-muenchen.de>]

Eckhard Kosin wrote:
> Hi,
>
> I formatted a dvd-ram with udf:
>
> mkudffs --media-type=dvdram /dev/scd0
>
> Than after mounting the dvd-ram I can copy files to it and a diff shows
> that the copied files are okay. To ensure that the files have really
> been written I switched the writer off and on and mounted and ejected
> another dvd between cp and diff, and there were no differences.  
>
> But if I try to recursively copy directories to the udf-formatted
> dvd-ram:
>
> cp -r /some/dir /media/cdrecord
>
> than after a few seconds the system freezes totally - only a power
> off/on to reboot is possible.
>
> The same occurs if I use Nautilus for the copying.
>
> However if I formatted the dvd-ram with ext2 filesystem, all went fine,
> no problems.
>
> I run Ubuntu 5.10 with kernel 2.6.12-10-amd64-generic on a Dell OPTIPLEX
> GX620 (Intel P4 620, 1G RAM), the dvd-writer is a NEC ND-4550A (Firmware
> 1.07), connected via USB2 with a Cypress Semiconductor Corp. USB-2.0 IDE
> Adapter.

Strange: why do you run a amd64 kernel on a Pentium 4?

I would check this out before investigating further.

Also check the output of syslog.

Why don't you post to Ubuntu?

Johannes