Re: pktcdvd and DVDRAM defect management

On Sat, 10 Nov 2007 22:10:40 +0100
Malte Gell <[email protected]> wrote:
> 
> I have a Samsung / TSSTcorp (BTW, have Samsung and Toshiba merged drive 
> production!?) SH-182M with the latest firmware dating from 06-2007, 
> this drive also supports light scribing.
> 
> According to the "RAM Promotion Group" Samsung, LG, Toshiba and all the 
> big ones are part of the DVDRAM specifiaction, so it really would be 
> nasty if their drives hurt their own specifications... ( 
> http://www.ramprg.com )
> 
> Before you replaced your drive, have you tried a different DVDRAM media 
> brand? I have used Verbatim 4,7G 3x speed DVDRAM media.
> 
> I see, LG works for you, the question remains, does this generally apply 
> to LG or just to certain drives...? Maybe we should start a little 
> survey at the opensuse list who uses what drive and whether it works.
> 

For all my file backups, I've been using either Maxell 4.7Gb
DVD-RAM 5X or Panasonic 4.7Gb DVD-RAM 3x.  Neither of these will
mount as R/W with the Plextor drive,  but both will mount R/W
with the LG drive.

Just to be clear, I will repeat my experiences.  My system is
Linux 2.6.23.  Using a Plextor 750A drive, DVD-RAM disks cannot
be mounted using the command: "mount -t udf -o rw /dev/hde /cdrom"

The error message I receive is:

block device /dev/hde is write protected, mounting read only
(there are no relevant messages in the kernel log)

It requires an extra "mount -o remount,rw ..."  command to get
the system to be able to read/write to the DVD-RAM disk.

However, when I substitute the Plextor 750A drive for the LG GSA-H42L
drive, the command: "mount -t udf -o rw /dev/hde /cdrom" is able to 
directly mount the disk for read/write without problem.

I don't know if the pktcdvd list is the appropriate place to
report this issue, but since it has been described by another
list member it does perhaps deserve some attention.

FP