* sr device can be written? @ 2005-08-30 4:53 jeff shia 2005-08-30 8:08 ` Tino Keitel 0 siblings, 1 reply; 6+ messages in thread From: jeff shia @ 2005-08-30 4:53 UTC (permalink / raw) To: linux-kernel 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? Jeff ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: sr device can be written? 2005-08-30 4:53 sr device can be written? jeff shia @ 2005-08-30 8:08 ` Tino Keitel 2005-08-30 8:11 ` jeff shia 0 siblings, 1 reply; 6+ messages in thread From: Tino Keitel @ 2005-08-30 8:08 UTC (permalink / raw) To: linux-kernel 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 ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: sr device can be written? 2005-08-30 8:08 ` Tino Keitel @ 2005-08-30 8:11 ` jeff shia 2005-08-30 9:53 ` Tino Keitel 0 siblings, 1 reply; 6+ messages in thread From: jeff shia @ 2005-08-30 8:11 UTC (permalink / raw) To: linux-kernel YOu mean the device file can be written? 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 > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: sr device can be written? 2005-08-30 8:11 ` jeff shia @ 2005-08-30 9:53 ` Tino Keitel 2005-08-30 11:07 ` jeff shia 0 siblings, 1 reply; 6+ messages in thread From: Tino Keitel @ 2005-08-30 9:53 UTC (permalink / raw) To: linux-kernel 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 > > - > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ > > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: sr device can be written? 2005-08-30 9:53 ` Tino Keitel @ 2005-08-30 11:07 ` jeff shia 2005-09-01 3:47 ` Randy.Dunlap 0 siblings, 1 reply; 6+ messages in thread From: jeff shia @ 2005-08-30 11:07 UTC (permalink / raw) To: linux-kernel 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? 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 > > > - > > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > > the body of a message to majordomo@vger.kernel.org > > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > Please read the FAQ at http://www.tux.org/lkml/ > > > > > - > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ > > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: sr device can be written? 2005-08-30 11:07 ` jeff shia @ 2005-09-01 3:47 ` Randy.Dunlap 0 siblings, 0 replies; 6+ messages in thread From: Randy.Dunlap @ 2005-09-01 3:47 UTC (permalink / raw) To: jeff shia; +Cc: linux-kernel 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 ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2005-09-01 3:47 UTC | newest] Thread overview: 6+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2005-08-30 4:53 sr device can be written? jeff shia 2005-08-30 8:08 ` Tino Keitel 2005-08-30 8:11 ` jeff shia 2005-08-30 9:53 ` Tino Keitel 2005-08-30 11:07 ` jeff shia 2005-09-01 3:47 ` Randy.Dunlap
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