[gentoo-user] writable devices being mounted as read only

On 8/7/06, sean <tech.junk DeleteThis @verizon.net> wrote:
> Hello All,
>
> Whenever I mount my USB DVD writer or my SCSI cd-rom writer I always
> get the following similar message for either device, root or otherwise.
>
> mount /mnt/dvd/
> mount: block device /dev/sr1 is write-protected, mounting read-onl
>
> Both devices in my fstab have 'noauto,user,rw' but still the write only
> message.
>
> Anyone give me any tips as to why and how to fix?

Because the ISO9660 filesystem is read-only. To write, you need to
build an iso image with mkisofs, and burn it with something like
cdrecord. Of course, there are lots of frontends available for this
function...take a look in portage under app-cdr.

There are some (IMO hackish) ways of making a RW drive work like a
hard drive, but I have no experience with them. The kernel option
CONFIG_CDROM_PKTCDVD might help.

-Richard
--
gentoo-user DeleteThis @gentoo.org mailing list

On 8/7/06, sean <tech.junk DeleteThis @verizon.net> wrote:
> Hello All,
>
> Whenever I mount my USB DVD writer or my SCSI cd-rom writer I always
> get the following similar message for either device, root or otherwise.
>
> mount /mnt/dvd/
> mount: block device /dev/sr1 is write-protected, mounting read-only
>
> Both devices in my fstab have 'noauto,user,rw' but still the write only
> message.
>
> Anyone give me any tips as to why and how to fix?
>
> Thanks
> Sean

The actual CD you're putting in is not writabble, if you mount it, you
can't simply move or copy files to it, can you? You must use an
application like cdrecord or a GUI like k3b to add sessions, write an
image or burn files to the CD/DVD while it is NOT mounted and remount
it. It will ALWAYS be mounted as read-only, that's of the nature of
CD-ROM (RO for READ ONLY) and DVD-ROM (that's what they become after
you burn them). Till someone invent something like directcd for
ruindows (maybe it already exists) so you can deal with CDs and DVDs
like they were normal block devices (RW) you won't be able to write
direcly to this type of device (and sincerely, I HATE those DirectCD
medias that only open in windows, need a special driver and is slow as
hell, so, Linux is better without such a "feature").

--
Daniel da Veiga
Computer Operator - RS - Brazil
-----BEGIN GEEK CODE BLOCK-----
Version: 3.1
GCM/IT/P/O d-? s:- a? C++$ UBLA++ P+ L++ E--- W+++$ N o+ K- w O M- V-
PS PE Y PGP- t+ 5 X+++ R+* tv b+ DI+++ D+ G+ e h+ r+ y++
------END GEEK CODE BLOCK------
--
gentoo-user DeleteThis @gentoo.org mailing list

On Monday 07 August 2006 21:49, sean wrote:
> Hello All,
>
> Whenever I mount my USB DVD writer or my SCSI cd-rom writer I always
> get the following similar message for either device, root or otherwise.
>
> mount /mnt/dvd/
> mount: block device /dev/sr1 is write-protected, mounting read-only
>
> Both devices in my fstab have 'noauto,user,rw' but still the write only
> message.

well, if you mount a burnt blank, it has to be read only. Empty blanks can not
be mounted. So everything seems to be ok. And if you want to write to a +rw
blank, you don't mount them too. AFAIR of course.
--
gentoo-user.TakeThisOut@gentoo.org mailing list

"Hemmann, Volker Armin" <volker.armin.hemmann.RemoveThis@tu-clausthal.de> writes:

> well, if you mount a burnt blank, it has to be read only. Empty blanks can not
> be mounted. So everything seems to be ok. And if you want to write to a +rw
> blank, you don't mount them too. AFAIR of course.

But you do mount a DVD-RAM.
--
gentoo-user.RemoveThis@gentoo.org mailing list

On Tuesday 08 August 2006 13:43, Dirk Heinrichs wrote:
> Am Dienstag, 8. August 2006 00:57 schrieb ext Hemmann, Volker Armin:
> > On Monday 07 August 2006 21:49, sean wrote:
> > > Hello All,
> > >
> > > Whenever I mount my USB DVD writer or my SCSI cd-rom writer I always
> > > get the following similar message for either device, root or otherwise.
> > >
> > > mount /mnt/dvd/
> > > mount: block device /dev/sr1 is write-protected, mounting read-only
>
> This is just a hint for you. /dev/sr1 is a read-only device per definition.
>
> > > Both devices in my fstab have 'noauto,user,rw' but still the write only
> > > message.

Try "modprobe sg" to get a writable device.

HTH
-Robin.
--
------------------------------------------------------
Robin Atwood
------------------------------------------------------











--
gentoo-user.DeleteThis@gentoo.org mailing list

On Tuesday 08 August 2006 08:04, Graham Murray wrote:
> "Hemmann, Volker Armin" <volker.armin.hemmann.RemoveThis@tu-clausthal.de> writes:
> > well, if you mount a burnt blank, it has to be read only. Empty blanks
> > can not be mounted. So everything seems to be ok. And if you want to
> > write to a +rw blank, you don't mount them too. AFAIR of course.
>
> But you do mount a DVD-RAM.

after fiddling around with pktdvd&co
--
gentoo-user.RemoveThis@gentoo.org mailing list

"Hemmann, Volker Armin" <volker.armin.hemmann DeleteThis @tu-clausthal.de> writes:

> On Tuesday 08 August 2006 08:04, Graham Murray wrote:
>> But you do mount a DVD-RAM.
>
> after fiddling around with pktdvd&co

No. Just put unused the DVD-RAM in the drive and format it just as if
it were a hard disk. Then mount and use it just like a normal hard
disk without having to do anything with pktdvd&co.
--
gentoo-user DeleteThis @gentoo.org mailing list

On Tuesday 08 August 2006 18:37, Dirk Heinrichs wrote:
> Am Dienstag, 8. August 2006 12:59 schrieb ext Robin Atwood:
>
> > Try "modprobe sg" to get a writable device.
>
> Wrong. sg is a char device, you can't mount it.

Works here, mate. When using k3b to burn a DVD I don't need to mount it.

-Robin.
--
----------------------------------------------------------------------
Robin Atwood.

"Ship me somewheres east of Suez, where the best is like the worst,
Where there ain't no Ten Commandments an' a man can raise a thirst"
from "Mandalay" by Rudyard Kipling
----------------------------------------------------------------------











--
gentoo-user.DeleteThis@gentoo.org mailing list