The answer is actually very simple -- my dvd device is /dev/sr7 instead of
/dev/sr1.
On Fri, 29 Oct 2004 17:02:41 -0400, Tong wrote:
> Thanks Justin.
>
> On Thu, 28 Oct 2004 11:27:22 -0600, Justin Guerin wrote:
>
>> On Wednesday 27 October 2004 19:03, Tong wrote:
>>> Hi,
>>>
>>> I used to be able to mount my dvd, but not now any more.
>>>
>> What did you change in between the times when you could mount it and when
>> you couldn't? Every detail you can remember is important.
>
> That was long time ago, I don't remember I've done anything
> significant to system setting, except from apt update from time to time,
> I think the only thing I did was to load more kernel modules for "cdrecord
> -scanbus" to report correctly. I now think the reason might be that
> my kernel modules mess up with each other.
>
>>> Here is my fstab:
>>>
>>> $ grep dvd /etc/fstab
>>> /dev/dvd /mnt/dvd auto noauto,user
>>>
>> Can you post the full listing of the device node?
>
> Hmm, I don't quite understand what you are asking for. But here are all
> the information that I think is relevant:
>
> $ cdrecord -scanbus
> scsibus0:
> 0,0,0 0) 'SONY ' 'CD-RW CRX195E1 ' 'ZYS5' Removable CD-ROM
> 0,1,0 1) 'Toshiba ' 'DVD-ROM SD-M1712' '1808' Removable CD-ROM
>
> $ ls -l /dev/dvd
> lrwxrwxrwx 1 root root 8 Oct 4 17:18 /dev/dvd -> /dev/hdd
>
> $ grep -Ei 'dvd|hdd' /var/log/dmesg
> Kernel command line: root=/dev/hda8 ro hdc=scsi hdd=scsi max_scsi_luns=1
> ide_setup: hdd=scsi
> ide1: BM-DMA at 0xff08-0xff0f, BIOS settings: hdc:DMA, hdd:DMA
> hdc: SONY CD-RW CRX195E1, ATAPI CD/DVD-ROM drive
> hdd: Toshiba DVD-ROM DSM-1712, ATAPI CD/DVD-ROM drive
> ide-cd: passing drive hdd to ide-scsi emulation.
>
>>> When I mount explicitly, I get:
>>>
>>> % mount -t iso9660 /dev/dvd /mnt/dvd/ mount: wrong fs type, bad option,
>>> bad superblock on /dev/dvd,
>>> or too many mounted file systems
>>> (could this be the IDE device where you in fact use ide-scsi so
>>> that sr0 or sda or so is needed?)
>>>
>>> % mount -t iso9660 /dev/sr0 /mnt/dvd/ mount: block device /dev/sr0 is
>>> write-protected, mounting read-only mount: No medium found
>>>
>>> What I can do?
>>>
>> Hmm, why did you use /dev/sr0? Is /dev/dvd a link pointing to it? If
>> it is, then please post the full listing of /dev/sr0. If it's not,
>> indicate why you think /dev/sr0 is the proper device node.
>
> I tried sr0 because of the error message given by mount.
>
> $ ls -l /dev/sr?
> lrwxrwxrwx 1 root root 4 Aug 8 11:48 /dev/sr0 -> scd0
> lrwxrwxrwx 1 root root 4 Aug 8 11:48 /dev/sr1 -> scd1
> [...]
> lrwxrwxrwx 1 root root 4 Aug 8 11:48 /dev/sr9 -> scd9
>
> Oh, I have new discovery now. Since my cdrom is working fine, I looked at
> how it is setup.
>
> $ ls -l /dev/cdrom
> lrwxrwxrwx 1 root root 8 Aug 18 12:17 /dev/cdrom -> /dev/sr0
>
> Hmm, yes, it was previously linked to /dev/hdc. I changed it from the hint
> of the error message given by mount.
>
> It means /dev/sr1 should be my dvd?
>
> $ mount -t iso9660 /dev/sr1 /mnt/dvd/
> mount: block device /dev/sr1 is write-protected, mounting read-only
> mount: No medium found
>
> No...
>
>> The error "No medium found" means mount thinks the drive is correct, but
>> there's no readable disk in it. What disk are you trying to mount?
>> Don't try to mount a music CD. Make sure whatever disk you're using is
>> valid, or else you'll never get this error to disappear. Do you have a
>> known good data disk you can try?
>
> I'm just trying with the same movie dvd that I tried last time. I remember
> that I was able to view the dvd movie before. Now I can't. That why I was
> trying to mount it and look into the problem.
>
>>> Here is my kernel modules:
>>>
>>> $ lsmod | grep -Ei 'scsi|cd|dvd|ide'
>>> ide-scsi 8464 0 (autoclean) scsi_mod 85312 4
>>> (autoclean) [sr_mod sg sd_mod ide-scsi] ide-cd
>>> 27936 0
>>> cdrom 25056 0 [sr_mod ide-cd] ide-detect
>>> 288 0 (autoclean) (unused) ide-disk 12512 12
>>> (autoclean) ide-core 94108 12 (autoclean) [ide-scsi
>>> ide-cd ide-detect sis5513 ide-disk]
>>>
>>> Thanks
>>>
>>> tong
>>
>> Oh, yeah, what kernel are you running?
>
> $ uname -a
> Linux cxmr 2.4.25-1-386 #2 Wed Apr 14 19:38:08 EST 2004 i686 GNU/Linux
>
>> Are you running devfs, or udev?
>
> I don't know, but I don't think so.
>
> $ lsmod | grep dev
>
> nothing found.
>
> What should be the standard place to access DVD in my current
> situation? -- ide-scsi module doesn't like /dev/dvd, but the /dev/sr{0,1}
> that it suggests do not work.
>
> Thanks.
>
> tong
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