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Date: Wed, 31 Aug 2005 20:47:41 -0700
From: "Randy.Dunlap" <rdunlap@xenotime.net>
To: jeff shia <tshxiayu@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: sr device can be written?
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On Tue, 30 Aug 2005 19:07:55 +0800 jeff shia wrote:

> but It seems that I can not open sr0 with openflags O_RDWR,why?
> open("/dev/sr0",O_RDWR);
> 
> It says:sr0 is a read only file sytem.
> why?

What media did you have in the drive?

For me, with a CD-ROM, I get the same that you reported,
but with a DVD+RW disc, it opens successfully.


> On 8/30/05, Tino Keitel <tino.keitel@gmx.de> wrote:
> > On Tue, Aug 30, 2005 at 16:11:58 +0800, jeff shia wrote:
> > > YOu mean the device file can be written?
> > 
> > Yes, like an ordinary block device.
> > 
> > >
> > >
> > > On 8/30/05, Tino Keitel <tino.keitel@gmx.de> wrote:
> > > > On Tue, Aug 30, 2005 at 12:53:51 +0800, jeff shia wrote:
> > > > > Hello,
> > > > >  Sr is the Scsi-cdrom device?so it can be read only?but look at the source=
> > > > > =20
> > > > > code I notice that
> > > > > sr can be written also!Is it right?
> > > >
> > > > Just imagine a DVD-RAM drive.
> > > >
> > > > Regards,
> > > > Tino
> > > > -

---
~Randy