Possible problem mounting Video DVD

Possible problem mounting Video DVD

[Stuart T Rogers]

I am hoping this is the right place for some advice on an issue I have 
with one type of Video DVD created on my Panasonic DVD Recorder. If this 
is not the right place, I apologise and would appreciate being directed 
to the correct team.

I have been having problems with Video DVDs created on my Panasonic DVD 
recorder which records terrestrial TV. They will not mount as browsable 
by a normal user on my Fedora 20 64bit system. All other Video DVDs from 
my Sony and LG recorders mount as browsable as they should. I can browse 
the directory structure OK with these failing DVDs only if I login as root.

The same problem happens on two different PCs so it is unlikely to be a 
hardware problem.

I can play these Video DVDs without any problem in Dragon Player, VLC or 
Kaffeine as a normal user on both PCs but any attempt to open them to 
rip the video in say K3B fails.

If I boot the PCs into Windows XP then I can browse the file structure 
as a normal user without any problem and on XP Pinnacle Studio can 
import the video with no problem at all.

The DVDs in question show the following error messages when placed in 
the drive:-

Jan 27 12:31:14 F20Main kernel: [16280.275124] sr 0:0:0:0: [sr0] Invalid 
command failure
Jan 27 12:31:14 F20Main kernel: [16280.275137] sr 0:0:0:0: [sr0]
Jan 27 12:31:14 F20Main kernel: [16280.275143] Result: hostbyte=DID_OK 
driverbyte=DRIVER_SENSE
Jan 27 12:31:14 F20Main kernel: [16280.275149] sr 0:0:0:0: [sr0]
Jan 27 12:31:14 F20Main kernel: [16280.275153] Sense Key : Illegal 
Request [current]
Jan 27 12:31:14 F20Main kernel: [16280.275160] sr 0:0:0:0: [sr0]
Jan 27 12:31:14 F20Main kernel: [16280.275166] Add. Sense: Invalid field 
in cdb
Jan 27 12:31:14 F20Main kernel: [16280.275171] sr 0:0:0:0: [sr0] CDB:
Jan 27 12:31:14 F20Main kernel: [16280.275174] Write(10): 2a 00 00 00 00 
40 00 00 01 00
Jan 27 12:31:14 F20Main kernel: [16280.275190] end_request: critical 
target error, dev sr0, sector 256
Jan 27 12:31:14 F20Main kernel: [16280.275199] Buffer I/O error on 
device sr0, logical block 64
Jan 27 12:31:14 F20Main kernel: [16280.275203] lost page write due to 
I/O error on sr0
Jan 27 12:31:14 F20Main kernel: [16280.491663] UDF-fs: INFO Mounting 
volume 'DVD_VIDEO_RECORDER', timestamp 2014/01/26 14:04 (1000)
Jan 27 12:31:14 F20Main udisksd[1084]: Mounted /dev/sr0 at 
/run/media/stuart/DVD_VIDEO_RECORDER on behalf of uid 1000

Is this a potential bug in the mount command?

Stuart
-- 
Website: http://www.stella-maris.org.uk
or:      http://www.broadstairs.org

Re: Possible problem mounting Video DVD

[Dale R. Worley]

> From: Stuart T Rogers <stuart@stella-maris.org.uk>

> I have been having problems with Video DVDs created on my Panasonic DVD 
> recorder which records terrestrial TV. 

> Jan 27 12:31:14 F20Main kernel: [16280.275124] sr 0:0:0:0: [sr0] Invalid 
> command failure
> Jan 27 12:31:14 F20Main kernel: [16280.275137] sr 0:0:0:0: [sr0]
> Jan 27 12:31:14 F20Main kernel: [16280.275143] Result: hostbyte=DID_OK 
> driverbyte=DRIVER_SENSE
> Jan 27 12:31:14 F20Main kernel: [16280.275149] sr 0:0:0:0: [sr0]
> Jan 27 12:31:14 F20Main kernel: [16280.275153] Sense Key : Illegal 
> Request [current]
> Jan 27 12:31:14 F20Main kernel: [16280.275160] sr 0:0:0:0: [sr0]
> Jan 27 12:31:14 F20Main kernel: [16280.275166] Add. Sense: Invalid field 
> in cdb
> Jan 27 12:31:14 F20Main kernel: [16280.275171] sr 0:0:0:0: [sr0] CDB:
> Jan 27 12:31:14 F20Main kernel: [16280.275174] Write(10): 2a 00 00 00 00 
> 40 00 00 01 00
> Jan 27 12:31:14 F20Main kernel: [16280.275190] end_request: critical 
> target error, dev sr0, sector 256
> Jan 27 12:31:14 F20Main kernel: [16280.275199] Buffer I/O error on 
> device sr0, logical block 64
> Jan 27 12:31:14 F20Main kernel: [16280.275203] lost page write due to 
> I/O error on sr0
> Jan 27 12:31:14 F20Main kernel: [16280.491663] UDF-fs: INFO Mounting 
> volume 'DVD_VIDEO_RECORDER', timestamp 2014/01/26 14:04 (1000)
> Jan 27 12:31:14 F20Main udisksd[1084]: Mounted /dev/sr0 at 
> /run/media/stuart/DVD_VIDEO_RECORDER on behalf of uid 1000
> 
> Is this a potential bug in the mount command?

I'm no expert.  It looks like the kernel mount() is actually getting
done correctly, given the message "Mounted /dev/sr0 ...".  Given that,
it's be surprising if the mount *command* would fail, since the
command is by default deaf to the exactly format of the volume.  What
output do you get from the command?

Dale

Re: Possible problem mounting Video DVD

[Stuart T Rogers]

On 28/01/14 21:26, Dale R. Worley wrote:
>> From: Stuart T Rogers <stuart@stella-maris.org.uk>
>
>> I have been having problems with Video DVDs created on my Panasonic DVD
>> recorder which records terrestrial TV.
>
>> Jan 27 12:31:14 F20Main kernel: [16280.275124] sr 0:0:0:0: [sr0] Invalid
>> command failure
>> Jan 27 12:31:14 F20Main kernel: [16280.275137] sr 0:0:0:0: [sr0]
>> Jan 27 12:31:14 F20Main kernel: [16280.275143] Result: hostbyte=DID_OK
>> driverbyte=DRIVER_SENSE
>> Jan 27 12:31:14 F20Main kernel: [16280.275149] sr 0:0:0:0: [sr0]
>> Jan 27 12:31:14 F20Main kernel: [16280.275153] Sense Key : Illegal
>> Request [current]
>> Jan 27 12:31:14 F20Main kernel: [16280.275160] sr 0:0:0:0: [sr0]
>> Jan 27 12:31:14 F20Main kernel: [16280.275166] Add. Sense: Invalid field
>> in cdb
>> Jan 27 12:31:14 F20Main kernel: [16280.275171] sr 0:0:0:0: [sr0] CDB:
>> Jan 27 12:31:14 F20Main kernel: [16280.275174] Write(10): 2a 00 00 00 00
>> 40 00 00 01 00
>> Jan 27 12:31:14 F20Main kernel: [16280.275190] end_request: critical
>> target error, dev sr0, sector 256
>> Jan 27 12:31:14 F20Main kernel: [16280.275199] Buffer I/O error on
>> device sr0, logical block 64
>> Jan 27 12:31:14 F20Main kernel: [16280.275203] lost page write due to
>> I/O error on sr0
>> Jan 27 12:31:14 F20Main kernel: [16280.491663] UDF-fs: INFO Mounting
>> volume 'DVD_VIDEO_RECORDER', timestamp 2014/01/26 14:04 (1000)
>> Jan 27 12:31:14 F20Main udisksd[1084]: Mounted /dev/sr0 at
>> /run/media/stuart/DVD_VIDEO_RECORDER on behalf of uid 1000
>>
>> Is this a potential bug in the mount command?
>
> I'm no expert.  It looks like the kernel mount() is actually getting
> done correctly, given the message "Mounted /dev/sr0 ...".  Given that,
> it's be surprising if the mount *command* would fail, since the
> command is by default deaf to the exactly format of the volume.  What
> output do you get from the command?
>
> Dale
> --
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>

Sorry I did not make myself completely clear, these disks mount with the 
wrong permissions, my user in this case uid 1000 has no access to the 
directory structure of the DVD, either a filemanager or cd in a console 
gets permission denied. All other DVDs I create from other recorders 
will mount with uid 1000 having read access to the directory structure.

Stuart

-- 
Website: http://www.stella-maris.org.uk
or:      http://www.broadstairs.org

Re: Possible problem mounting Video DVD

[Dale R. Worley]

> From: Stuart T Rogers <stuart@stella-maris.org.uk>

> Sorry I did not make myself completely clear, these disks mount with the 
> wrong permissions, my user in this case uid 1000 has no access to the 
> directory structure of the DVD, either a filemanager or cd in a console 
> gets permission denied. All other DVDs I create from other recorders 
> will mount with uid 1000 having read access to the directory structure.

Can you provide the exact mount command that you are using, an "ls
-al" showing what user/group/permissions the files *are* showing up
as, etc.?  There's a tremendous amount of information that you're not
telling us, and even if I had your DVD and your computer in hand, I
couldn't begin to verify that I'm seeing the same problem you are
having.

"How to Report Bugs Effectively"
http://www.chiark.greenend.org.uk/~sgtatham/bugs.html

Dale

Re: Possible problem mounting Video DVD

[Stuart T Rogers]

On 29/01/14 20:54, Dale R. Worley wrote:
>> From: Stuart T Rogers <stuart@stella-maris.org.uk>
>
>> Sorry I did not make myself completely clear, these disks mount with the
>> wrong permissions, my user in this case uid 1000 has no access to the
>> directory structure of the DVD, either a filemanager or cd in a console
>> gets permission denied. All other DVDs I create from other recorders
>> will mount with uid 1000 having read access to the directory structure.
>
> Can you provide the exact mount command that you are using, an "ls
> -al" showing what user/group/permissions the files *are* showing up
> as, etc.?  There's a tremendous amount of information that you're not
> telling us, and even if I had your DVD and your computer in hand, I
> couldn't begin to verify that I'm seeing the same problem you are
> having.
>
> "How to Report Bugs Effectively"
> http://www.chiark.greenend.org.uk/~sgtatham/bugs.html
>
> Dale
>
OK let me explain, I am not issuing any mount commands myself. I place 
the DVD in the drive and close it, wait until it appears in the device 
notifier and select action Open in File Manager, when it opens having 
been mounted by the system at run/media/stuart/DVD_RECORDER the response 
from Dolphin is that the permissions wont allow me to open the root 
directory of the drive for browsing. If I try to play the video using 
Dragon etc again this works OK the permissions it is mounted with do not 
stop that action.

This should work. It does work for every other type of DVD Video that I 
use so long as it is NOT created on the Panasonic DVD Recorder.

I have had a thread open in Fedora forums at 
http://forums.fedoraforum.org/showthread.php?t=296874 which you can 
review to see what has been tried.

I dont expect to have to do any mount commands manually - the system 
should handle it for me.

Stuart
-- 
Website: http://www.stella-maris.org.uk
or:      http://www.broadstairs.org

Re: Possible problem mounting Video DVD

[Dale R. Worley]

> From: Stuart T Rogers <stuart@stella-maris.org.uk>

> OK let me explain, I am not issuing any mount commands myself. I place 
> the DVD in the drive and close it, wait until it appears in the device 
> notifier and select action Open in File Manager, when it opens having 
> been mounted by the system at run/media/stuart/DVD_RECORDER the response 
> from Dolphin is that the permissions wont allow me to open the root 
> directory of the drive for browsing. If I try to play the video using 
> Dragon etc again this works OK the permissions it is mounted with do not 
> stop that action.

In regard to *playing* the videos, it's possible that the players
don't mount the DVD as a file system at all, so the fact that they
work isn't particularly informative.

http://forums.fedoraforum.org/showthread.php?t=296874

It looks like Skull One in that thread has the best explanation.  I'm
not familiar with the details of mounting DVDs, but he suggests that
the directories /run/media/stuart/DVD_VIDEO_RECORDER and
/run/media/stuart/LG_VDR *on your disk* may have different
permissions, and those permissions leak into the permissions seen when
a DVD is mounted there.  So what are the permissions on those
directories (when no DVD is mounted)?

In any case, it's unlikely to be a problem that this mailing list
deals with.  We only handle the mount executable.  One possibility is
that the DVD mount and processing code in the kernel is providing
unreasonable permission values (after all, it synthesizes them), in
which case the fix is a kernel change.  Another possibility is that
adjusting the permissions of /run/media/stuart/DVD_VIDEO_RECORDER will
make the problem go away, in which case it can reasonably be
considered to be a configuration error.  It's also possible that
whatever is automounting the DVD isn't being smart enough about the
permissions it is setting up for the DVD file system.  That would be a
problem for the a different mailing list.

Dale

Re: Possible problem mounting Video DVD

[Stuart T Rogers]

On 30/01/14 19:06, Dale R. Worley wrote:
>> From: Stuart T Rogers <stuart@stella-maris.org.uk>
>
>> OK let me explain, I am not issuing any mount commands myself. I place
>> the DVD in the drive and close it, wait until it appears in the device
>> notifier and select action Open in File Manager, when it opens having
>> been mounted by the system at run/media/stuart/DVD_RECORDER the response
>> from Dolphin is that the permissions wont allow me to open the root
>> directory of the drive for browsing. If I try to play the video using
>> Dragon etc again this works OK the permissions it is mounted with do not
>> stop that action.
>
> In regard to *playing* the videos, it's possible that the players
> don't mount the DVD as a file system at all, so the fact that they
> work isn't particularly informative.
>
> http://forums.fedoraforum.org/showthread.php?t=296874
>
> It looks like Skull One in that thread has the best explanation.  I'm
> not familiar with the details of mounting DVDs, but he suggests that
> the directories /run/media/stuart/DVD_VIDEO_RECORDER and
> /run/media/stuart/LG_VDR *on your disk* may have different
> permissions, and those permissions leak into the permissions seen when
> a DVD is mounted there.  So what are the permissions on those
> directories (when no DVD is mounted)?
>
> In any case, it's unlikely to be a problem that this mailing list
> deals with.  We only handle the mount executable.  One possibility is
> that the DVD mount and processing code in the kernel is providing
> unreasonable permission values (after all, it synthesizes them), in
> which case the fix is a kernel change.  Another possibility is that
> adjusting the permissions of /run/media/stuart/DVD_VIDEO_RECORDER will
> make the problem go away, in which case it can reasonably be
> considered to be a configuration error.  It's also possible that
> whatever is automounting the DVD isn't being smart enough about the
> permissions it is setting up for the DVD file system.  That would be a
> problem for the a different mailing list.
>
> Dale
>

Dale

Thanks for that explanation. The only thing regarding the DVD_RECORDER 
directory is that it does not exist until the DVD is mounted so whoever 
creates it sets the permissions. The name DVD_RECORDER is the volume 
name of the DVD. I'm not sure how the DVD can itself have permissions 
attributed to it though.

I will attempt to discover the right place to progress this issue.

Stuart

-- 
Website: http://www.stella-maris.org.uk
or:      http://www.broadstairs.org

Re: Possible problem mounting Video DVD

[Dale R. Worley]

> From: Stuart T Rogers <stuart@stella-maris.org.uk>

> Thanks for that explanation. The only thing regarding the DVD_RECORDER 
> directory is that it does not exist until the DVD is mounted so whoever 
> creates it sets the permissions. The name DVD_RECORDER is the volume 
> name of the DVD. I'm not sure how the DVD can itself have permissions 
> attributed to it though.

One thing you can try for diagnosis is this:  Insert the DVD and wait
for it to show up in File Manager.  Then go to a shell and run "df".
That command lists *all* of the file systems that are rightly and
properly mounted.  Most likely, /run/media/stuart/DVD_RECORDER will
show up as a mount point, showing that your DVD *actually is*
mounted.  Which starts to narrow down where things could be going
wrong.

Then run "mount".  That dumps a lot of information about the options
that were used during the mount operation.  In particular, the word
after "type" in the relevant line is the type of file system, and the
stuff in parentheses is the options.  You can go to the mount manual
page and look up the options to see if one of the options is buggering
how the DVD is mounted.

You can also do "ls -al /run/media/stuart/DVD_RECORDER", which will
show what the permissions are of the DVD_RECORDER directory and also
the subdirectories within it.  (Under normal conditions, those should
be the same.)

This will give you some info to help figure out what's messing up:
the program creating DVD_RECORDER, the mount command that is getting
executed, the mount program itself, or the kernel filesystem code.

Dale