Re: "attempt to access beyond end of device" on DVD

Re: "attempt to access beyond end of device" on DVD

[Bruno Prémont]

On Wed, 12 December 2012 Jacek Poplawski <jacekpoplawski@gmail.com> wrote:
> OK, I was wrong previously.
> 
> I don't need to reload sr_mod, I only need to remount DVD.
> 
> The reason I was wrong is I was suspecting that DVD remounts itself
> after eject, but looks like it doesn't. Also it means that the problem
> is different than 3 years ago, because I am sure I was remounting DVD
> by hand and now I use some automount feature of Arch Linux / GNOME3.

What kind of filesystem do you have on your CD/DVDs?

[CCing linux-fsdevel as it seems like it may be a isofs or udf issue]

Bruno

> On 12/12/12, Jacek Poplawski <jacekpoplawski@gmail.com> wrote:
> >> Did you check if unbinding drivers or unloading their modules has the
> >> same effect as rebooting? That might help narrowing the area of code to
> >> look at.
> >
> > You were right.
> > I unmounted the DVD, then removed module sr_mod, reloaded it, inserted
> > DVD again and copied missing files, now they are OK.
> >
> >
> >> While at it, please tell us how your CD/DVD drive is connected and which
> >> controller it's connected to (relevant dmesg parts).
> >
> > [    0.893465] ata5.00: ATAPI: Optiarc DVD RW AD-7203S, 1.05, max UDMA/100
> > [    0.906796] ata5.00: configured for UDMA/100
> > (...)
> > [    1.232096] scsi 4:0:0:0: CD-ROM            Optiarc  DVD RW
> > AD-7203S  1.05 PQ: 0 ANSI: 5
> > (...)
> > [  897.871546] sr0: scsi3-mmc drive: 125x/125x writer dvd-ram cd/rw
> > xa/form2 cdda tray
> > [  897.871726] sr 4:0:0:0: Attached scsi CD-ROM sr0
> >
> > I don't have other devices to test (and haven't tried loop device).
> >

Re: "attempt to access beyond end of device" on DVD

[Jacek Poplawski]

On 12/12/12, Bruno Prémont <bonbons@linux-vserver.org> wrote:
> On Wed, 12 December 2012 Jacek Poplawski <jacekpoplawski@gmail.com> wrote:
>> OK, I was wrong previously.
>>
>> I don't need to reload sr_mod, I only need to remount DVD.
>>
>> The reason I was wrong is I was suspecting that DVD remounts itself
>> after eject, but looks like it doesn't. Also it means that the problem
>> is different than 3 years ago, because I am sure I was remounting DVD
>> by hand and now I use some automount feature of Arch Linux / GNOME3.
>
> What kind of filesystem do you have on your CD/DVDs?

I backup files with k3b with default settings, so it is iso9660.

However I don't fully understand how this automount works, I am afraid
this problem it may be related to this mechanism. When I insert first
DVD it's mounted and when I remove DVD and put another one it's still
mounted as before, so maybe driver is confused and still thinks the
size of the DVD is like the first one.

Re: "attempt to access beyond end of device" on DVD

[Bruno Prémont]

On Wed, 12 December 2012 Jacek Poplawski wrote:
> On 12/12/12, Bruno Prémont wrote:
> > On Wed, 12 December 2012 Jacek Poplawski wrote:
> >> OK, I was wrong previously.
> >>
> >> I don't need to reload sr_mod, I only need to remount DVD.
> >>
> >> The reason I was wrong is I was suspecting that DVD remounts itself
> >> after eject, but looks like it doesn't. Also it means that the problem
> >> is different than 3 years ago, because I am sure I was remounting DVD
> >> by hand and now I use some automount feature of Arch Linux / GNOME3.
> >
> > What kind of filesystem do you have on your CD/DVDs?
> 
> I backup files with k3b with default settings, so it is iso9660.
> 
> However I don't fully understand how this automount works, I am afraid
> this problem it may be related to this mechanism. When I insert first
> DVD it's mounted and when I remove DVD and put another one it's still
> mounted as before, so maybe driver is confused and still thinks the
> size of the DVD is like the first one.

Usually you have to unmount CD/DVD to be able to eject it (otherwise tray
is locked).
I never used automount myself so I can't tell, tough I would expect it to
catch "eject" request, unmount and then eject the disc.

Bruno