Mounting Cdrom

Underhill · 09-17-2004, 12:15 PM

Hi there,

I'm trying to mount my CD-ROM but couldn't find it at /dev/cdrom or /dev/hdc or /dev/hdd etc.

When i run dmesg | grep hd

Code:

debian:/home/azri# dmesg | grep hd
SCSI device sda: 488397168 512-byte hdwr sectors (250059 MB)

I don't even see my hda. Please help. Thanks.

Moloko · 09-17-2004, 05:05 PM

Do you have the module ide-cd/cdrom (kernel 2.6 name) loaded and is there an entry in fstab for the cdrom?

Underhill · 09-17-2004, 08:49 PM

No entry for Cd-Rom in fstab, i'm trying to create one. When i lsmod, i found this:

ide_cd 38916 0
ide_core 127448 2 piix,ide_cd
cdrom 35360 1 ide_cd

leonscape · 09-17-2004, 08:56 PM

Okay what device is the CD on? Try grepping for CD-ROM or CDROM.

Underhill · 09-17-2004, 09:00 PM

Sorry, how do i do that. My CD drive is IDE.

leonscape · 09-17-2004, 09:17 PM

To know what device you CDROM is under this will help:
hda is Primary Master ( usually your Hard disk )
hdb is Primary Slave
hdc is Secondary Master ( Normally where your CD is )
hdd is Secondary Slave

first login as root, and then create a mount point for the CDROM. Usually the install has made one for you, either /cdrom /mnt/cdrom or /media/cdrom. If you dint have one of these too create one use the command mkdir.

i.e.
mkdir /mnt/cdrom

Next place a CD in the drive and type

mount -t iso9660 /dev/hdc /mnt/cdrom

( Adjusting /dev/hdc and the mount point appropriately ). If it fails you may have the wrong device so try another.

Once you get this working you'll know what line to enter in the /etc/fstab file. for instance this is mine

/dev/hdc /mnt/cdrom iso9660 ro,user,noauto 0 0

If your wondering iso9660 is simply the file format for data cd's. Its important to note you don't mount music CD's. These are played directly from the device.

Underhill · 09-17-2004, 09:49 PM

I've tried that before.

mount: special device /dev/hdc does not exist
mount: special device /dev/hdd does not exist

I couldn't even mount my hda. Seems like it only sees my sda.

leonscape · 09-17-2004, 09:55 PM

try sda, what might be going on is that you have scsi emulation enabled for this device, so Linux is treating it as scsi and not ide.

This is used mainly for CDRW. look in /etc/lilo.conf or /boot/grub/menu.lst for something that reads hdc=scsi-ide or similar.

utanja · 09-17-2004, 10:48 PM

i am having similar problem....burning CD is fine....using scsi emulation with 2.6 kernel ...even thou IDE is recommended i could never get it to work....however i cannot mount ISO cds...

Underhill · 09-17-2004, 11:10 PM

Quote:

Originally posted by leonscape
try sda, what might be going on is that you have scsi emulation enabled for this device, so Linux is treating it as scsi and not ide.

This is used mainly for CDRW. look in /etc/lilo.conf or /boot/grub/menu.lst for something that reads hdc=scsi-ide or similar.

Couldn't find that hdc=scsi-ide or similar. Here it is:

Code:

title		Debian GNU/Linux, kernel 2.6.7-1-386 
root		(hd1,6)
kernel		/boot/vmlinuz-2.6.7-1-386 root=/dev/sda7 ro 
initrd		/boot/initrd.img-2.6.7-1-386
savedefault
boot

Here's my /etc/fstab if that help:

Code:

/dev/sda7               /                       ext3    defaults        1 1
none                    /dev/pts                devpts  gid=5,mode=620  0 0
none                    /dev/shm                tmpfs   defaults        0 0
none                    /proc                   proc    defaults        0 0
none                    /sys                    sysfs   defaults        0 0
/dev/sda6               swap                    swap    defaults        0 0
/dev/floppy/0	/media/hal/Floppy	auto	noauto,user,exec 0 0
/dev/scsi/host0/bus0/target0/lun0/part5	/media/hal/Data	vfat	noauto,user,exec 0 0
/dev/scsi/host0/bus0/target0/lun0/part2	/media/hal/disk-8-2-	auto	noauto,user,exec 0 0
/dev/scsi/host0/bus0/target0/lun0/part6	/media/hal/disk-8-6-	swap	noauto,user,exec 0 0
/dev/scsi/host0/bus0/target0/lun0/part1	/media/hal/disk-8-1-	ntfs	noauto,user,exec 0 0
/dev/scsi/host0/bus0/target0/lun0/part7	/media/hal/disk-8-7-	ext3	noauto,user,exec 0 0

I should have my hda (my Windows XP) and Cdrom, but nadha.

Thanks

Underhill · 09-18-2004, 09:06 AM

hmmmm no reply

Anyway, where can i see the boot log?

leonscape · 09-18-2004, 03:38 PM

The boot log are usually in /var/log/ are you sure its not scsi?

use dmesg | grep CD

Should return any CD-ROM drives.

hdc: TOSHIBA DVD-ROM SD-M1502, ATAPI CD/DVD-ROM drive
hdd: CD-W54E, ATAPI CD/DVD-ROM drive

is what I get.

Underhill · 09-18-2004, 10:42 PM

I get nothing with dmesg | grep CD. I'm sure it's not SCSI, i put this drive by myself. And furthermore, i couldnt see my hda (80 IDE).

With fdisk -l

Code:

Disk /dev/sda: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1       11937    95883921    7  HPFS/NTFS
/dev/sda2           11938       30401   148312080    f  W95 Ext'd (LBA)
/dev/sda5           11938       25051   105338173+   b  W95 FAT32
/dev/sda6           30274       30401     1028128+  82  Linux swap
/dev/sda7           25052       30273    41945683+  83  Linux

Where's my other IDE drive? Do i have to load some module or something?

I saw when booting, something like proc cat /media/*/ide no such file or directory. Could it be the problem? Couldn't find the exact message in /var/log

Underhill · 09-20-2004, 12:01 AM

leonscape · 09-20-2004, 01:42 PM

Okay, this is strange as you seem to be using a standard Kernel which does have IDE stuff already built in, your scsi disk is showing though. hmmm.

try

dmesg | grep ide

to see if you get anything from it.