CDROM not mounting

J

jaymax

This has been addressed in many threads but solutions, where they have appeared, do not seem to be applicable here.

There are two optical devices on the platform

The System is rebooted
Code: 
# uname -a
FreeBSD MACH1 10.2-RELEASE FreeBSD 10.2-RELEASE #0 r286666: Wed Aug 12 19:31:38 UTC 2015  root@releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  i386

From dmesg =>

# cat /var/log/dmesg.today | grep -i cd0
Code: 
cd0 at ata1 bus 0 scbus7 target 0 lun 0
cd0: <CD-ROM Drive/G6D 1.30> Removable CD-ROM SCSI device
cd0: Serial Number MT1198-B Firmware
cd0: 33.300MB/s transfers (UDMA2, ATAPI 12bytes, PIO 65534bytes)
cd0: Attempt to query device size failed: NOT READY, Medium not present

# cat /var/log/dmesg.today | grep -i cd1
Code: 
cd1 at ata1 bus 0 scbus7 target 1 lun 0
cd1: <_NEC DVD_RW ND-3550A 1.05> Removable CD-ROM SCSI device
cd1: 33.300MB/s transfers (UDMA2, ATAPI 12bytes, PIO 65534bytes)
cd1: Attempt to query device size failed: NOT READY, Medium not present

# ls /dev/cd*
Code: 
/dev/cd0  /dev/cd1

# file /dev/cd*
Code: 
/dev/cd0: character special (0/111)
/dev/cd1: character special (0/112)

cd and dvd discs were placed in cd and dvd devices respectively

mount -t cd9660 /dev/cd1 /dvd
/dvd mounts fine and shows up in df -k listing

However,
mount -t cd9660 /dev/cd0 /cdrom
[mount also attempted with alternate filesystems but with similar results.]
/cdrom does not mount but returns all sorts of errors viz:

# mount -t cd9660 /dev/cd0 /cdrom
Code: 
mount_cd9660: /dev/cd0: Device not configured
# mount -t iso9660 /dev/cd0 /cdrom
Code: 
mount: /dev/cd0: Operation not supported by device
# mount -t udf /dev/cd0 /cdrom
Code: 
mount_udf: /dev/cd0: Device not configured

A verified cd, readable in /dvd was inserted in /cdrom
mount -t cd9660 /dev/cd0 /cdrom
==> messages -
Code: 
May 23 01:28:00 MACH1 kernel: g_vfs_done():cd0[READ(offset=32768, length=2048)]error = 6
May 23 01:41:51 MACH1 kernel: g_vfs_done():cd0[READ(offset=32768, length=2048)]error = 6
May 23 01:43:06 MACH1 kernel: g_vfs_done():cd0[READ(offset=524288, length=2048)]error = 6

I've tried other things too
The mount points exist, permission on /cdrom changed to 777 but made no difference realized.
Entries changed in /etc/devfs.conf
Code: 
   link  cd0  cdrom
   link  cd1  dvd
Entered- autofs_enable="YES" to /etc/rc.conf

Nothing seemed to work!
What have I done wrong or am not doing?
 
A distinct possibility, except that this failure would be coincident with the replacement of a system disk with a cloned disk. Was working perfectly just before the event, cables seem intact.
 
jaymax said:
A distinct possibility, except that this failure would be coincident with the replacement of a system disk with a cloned disk.
Click to expand...
More often than not things tend to break when you power them off after a long uptime. In any case, it's not a driver setting or something like it.
 
The errors indicate read errors. Sometimes cables or connectors fail or go intermittent after components have been changed. This seems to happen more often on older systems, particularly when the cables have not been touched in a long time.
 
jaymax said:
# mount -t cd9660 /dev/cd0 /cdrom
Code: 
mount_cd9660: /dev/cd0: Device not configured
# mount -t iso9660 /dev/cd0 /cdrom
Code: 
mount: /dev/cd0: Operation not supported by device
# mount -t udf /dev/cd0 /cdrom
Code: 
mount_udf: /dev/cd0: Device not configured
Click to expand...
This is a brilliant CD/DVD mount list! You saved me with UDF
 
Code: 
root@abhi:/usr/ports/multimedia/mplayer # mount -t cd9660 /dev/cd0 /cdrom
mount: /cdrom: No such file or directory
root@abhi:/usr/ports/multimedia/mplayer # ls /dev/cd*
/dev/cd0    /dev/cdrom

what can i do...?
 
You don't have a /cdrom directory, so you can't mount anything on it. The mountpoint has to exist.
 
Dear Abhi,
just to add some information, you can use existing directories. There is no need to force mounting to /cdrom. A standard mount point is /mnt. This is what I use regulary. There is an additional default existing directory /media. As far as I know this is where the auto mounter usually adds mount points. I do not use any auto mount system. In the rare cases whre I have more than one device to mount I use /mnt] for one device, for example an USB stick. The second device as a USB disk or so I mount to /media. I do so for convenience because these directories exist by default.
 
Note that /mnt is meant to be used as a temporary mount point. I often see people use it for permanent mounts. For just a quick mount for a CD for example it's perfect.

mount -t cd9660 /dev/cd0 /mnt
 
I have tested that with an ancient CD from 1995
Code: 
# mount -t cd9600 /dev/cd0 /mnt/                               <<<<<<< typo, please see below. Sorry I am sorry for the noise.
mount: /dev/cd0: Operation not supported by device
But
Code: 
# mount_cd9660 /dev/cd0 /mnt/
#
works and I can see the content of the cd in /mnt. I will try a few other CDs. But I do not understand the behaviour. According to [man 8]mount[/man] the upper command should call the lower command because of the type.
Code: 
             However, for the following file system types: cd9660, mfs,
             msdosfs, nfs, nullfs, smbfs, udf, and unionfs mount will not call
             nmount(2) directly and will instead attempt to execute a program
             in /sbin/mount_type where type is replaced by the file system
             type name.  For example, nfs file systems are mounted by the
             program /sbin/mount_nfs.
May be SirDice knows the reason.
 
mount(8) defaults to trying to mount read/write, it doesn't know the difference.

mount -t cd9660 -r /dev/cd0 /mnt/
 
chrbr said:
# mount -t cd9600 /dev/cd0 /mnt/ mount: /dev/cd0: Operation not supported by device
Click to expand...
Now it is time for me to feel stupid. mount -t cd9660 /dev/cd0 /mnt works. I have overlooked the typing mistake which took me some time....
But now I have no idea regarding the issue of Abhi.
 
Code: 
root@abhi:/usr/home/abhi # mount_cd9660 /dev/cd0 /mnt/
mount_cd9660: /dev/cd0: Device not configured
root@abhi:/usr/home/abhi # mount -t cd9660 -r /dev/cd0 /mnt/
mount_cd9660: /dev/cd0: Device not configured
root@abhi:/usr/home/abhi # mount -t cd9660 /dev/cd0 /mnt 
mount_cd9660: /dev/cd0: Device not configured
root@abhi:/usr/home/abhi # mount -t cd9660 /dev/cd0 /cdrom

....................
I tested all these commands...but failed to mount.....is there any way to mount....or how to configure device ???
....thanks for your kind help......
 
Last edited by a moderator:
Abhi said:
root@abhi:/usr/home/abhi # mount_cd9660 /dev/cd0 /mnt/
mount_cd9660: /dev/cd0: Device not configured
root@abhi:/usr/home/abhi # mount -t cd9660 -r /dev/cd0 /mnt/
mount_cd9660: /dev/cd0: Device not configured
root@abhi:/usr/home/abhi # mount -t cd9660 /dev/cd0 /mnt
mount_cd9660: /dev/cd0: Device not configured
root@abhi:/usr/home/abhi # mount -t cd9660 /dev/cd0 /cdrom


....................
I tested all these commands...but failed to mount.....is there any way to mount....or how to configure device ???
....thanks for your kind help......
Click to expand...


Abhi said:
mount -t udf /dev/cd0 /mnt/
Click to expand...
or
iso9660
 
What does file -s /dev/cd0 tell you? Have you tried other CDs? You may just have a bad CD. Or a broken drive.
 
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