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

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

[sean]

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

[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
>
> 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.
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Re: [gentoo-user] writable devices being mounted as read only

[Graham Murray]

"Hemmann, Volker Armin" <volker.armin.hemmann@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.
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Re: [gentoo-user] writable devices being mounted as read only

[Dirk Heinrichs]

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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.

You can't enable things which are not there. A read-only device will stay 
read-only no matter what you put in fstab.

> 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.

That clearly depends on the filesystem you use. If you use iso9660, you have 
to create an image which is burnt to the disc unmounted.

However, if you use UDF on RW media (CD or DVD), you create a device mapping 
via pktcdvd.ko and pktsetup and mount the disc just like anything else.

Bye...

	Dirk
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Dirk Heinrichs          | Tel:  +49 (0)162 234 3408
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Re: [gentoo-user] writable devices being mounted as read only

[Robin Atwood]

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
------------------------------------------------------











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

[Hemmann, Volker Armin]

On Tuesday 08 August 2006 08:04, Graham Murray wrote:
> "Hemmann, Volker Armin" <volker.armin.hemmann@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 ;)
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Re: [gentoo-user] writable devices being mounted as read only

[Dirk Heinrichs]

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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.

Bye...

	Dirk
-- 
Dirk Heinrichs          | Tel:  +49 (0)162 234 3408
Configuration Manager   | Fax:  +49 (0)211 47068 111
Capgemini Deutschland   | Mail: dirk.heinrichs@capgemini.com
Hambornerstraße 55      | Web:  http://www.capgemini.com
D-40472 Düsseldorf      | ICQ#: 110037733
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