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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