Re: pktcdvd and DVDRAM defect management

On Fri, 9 Nov 2007 07:39:05 +0100
Malte Gell <[email protected]> wrote:

> ... and one other thing, when I do
> 
>  mount -t udf -o rw,noatime /dev/sr1 /mnt/dvdram
> 
> the media is mounted readonly... after that I always have to issue
> 
> mount -o remount /mnt/dvdram
> 
> in order to finally get rw access to the drive. I guess this is an 
> annoying bug somewhere? So this is why i use pktcdvd. Is there a 
> workaround for this rw-access issue when not using pktcdvd?
> 

For the longest time, I had the same experience.  I had to
remount in order to be able to read/write.  I even reported
the problem to the kernel mailing list but received no interest.
Also, a google search did not find similar reports.

But then I changed DVD-RAM drives from Plextor to LG and
the problem vanished.  It is the same system, but only a
different drive and now I have no trouble with directly mounting
as read/write.

If possible, I would suggest trying a different DVD-RAM
drive and report the results back to the list.

>
> Can you install an UDF filesystem with mkudffs directly
> on your drive wihtout pktcdvd?
>

DVD-RAM disks come pre-formatted as UDF so there is no
need to create a filesystem.  But just to check the command,
I took a new DVD-RAM disk and executed (without pktcdvd):

mkudffs -r 0x150 --media-type dvdram /dev/hde

Then:

mount -t udf -o rw,noatime /dev/hde /cdrom

There were no problems. (The drive is LG.)

But, again, the Plextor drive had caused me great problems
with formatting, and again, when I changed to an LG drive,
all the problems vanished.

What drive are you using?  Would it be possible for you
to use another drive?  DVD-RAM drives are currently very
cheap.

All DVD-RAM drives should follow the standards, but
apparently they do not since Plextor has caused me so
much trouble.  More reports from users are needed to
clarify this issue.  Hopefully, others on this list
can provide further information.

FP