USB External cd-rw recognized only using knoppix cd

[bilzer]

Hi-Val external usb-2 cd-rw atapi (made by Acer) is recognized when I run from the knoppix cd if the cd-rw is turned on at startup. An icon appears on the desktop, and the kde control center usb shows it's there, and I can read a cd which is in the drive.

I have installed knoppix and tried to get it to recognize the cd-rw using the same /etc/fstab setup which appears when running knoppix cd, and several other configurations of /etc/fstab and /mnt.

The cd-rw does not appear in the usb part of the kde control center. USB ports are recognized.
I would like to be able to access the cd-rw from a desktop icon, read and burn cd's.
Any help appreciated.

[aay]

I suspect that your writer was detected w/o any problems, but just to make sure please supply the following information.

Give the output of: "cdrecord --scanbus"

We can see if things are configured correctly if you post the contents of /etc/fstab

[bilzer]

Thanks for the reply.

Cdrecord 1.11a34 (i686-pc-linux-gnu) Copyright (C) 1995-2002 Jörg Schilling
Using libscg version 'schily-0.6'
scsibus0:
0,0,0 0) 'TOSHIBA ' 'CD-ROM XM-6202BD' '1119' Removable CD-ROM
0,1,0 1) *
0,2,0 2) *
0,3,0 3) *
0,4,0 4) *
0,5,0 5) *
0,6,0 6) *
0,7,0 7) *
scsibus1:
1,0,0 100) '' '' '' Removable not present Disk
1,1,0 101) *
1,2,0 102) *
1,3,0 103) *
1,4,0 104) *
1,5,0 105) *
1,6,0 106) *
1,7,0 107) *

(I have no /mnt settings in this configuration - tried with/without -tried iso9660 too)
# /etc/fstab: filesystem table.
#
# filesystem mountpoint type options dump pass
/dev/hdc3 / ext2 defaults,errors=remount-ro 0 1
/dev/hdc2 none swap sw 0 0
proc /proc proc defaults 0 0
/dev/fd0 /floppy vfat defaults,user,noauto,showexec,umask=022 0 0
/dev/cdrom /cdrom iso9660 defaults,ro,user,noexec,noauto 0 0
/dev/cdrom1 /cdrom1 auto user,noauto,exec,ro 0 0
none /proc/bus/usb/ usbdevfs defaults 0 0
# partitions found by Knoppix
/dev/hdc1 /mnt/hdc1 vfat noauto,users,exec,umask=000,uid=knoppix,gid=knoppi x 0 0
/dev/hdc3 /mnt/hdc3 ext2 noauto,users,exec 0 0
/dev/hda1 /mnt/hda1 vfat noauto,users,exec,umask=000,uid=knoppix,gid=knoppi x 0 0
/dev/hda5 /mnt/hda5 ext2 noauto,users,exec 0 0

[bilzer]

One more thing - I added "none /proc.....etc as you see in /etc/fstab and the cd-rw shows under scsi devices in kde control center, but not under the usb devices, which just show the hubs

[paradocs]

Hello all,
I agree with aay ;knoppix is great at detection.
My usb 2 CDRW (kanguru) is recognised.

At times my KDE desk top icons for
dirves need a little help.

Right click on the screen --> Create New
--> CD/DVD-ROM Device --> Device
--> click down arrow and pick or
if not listed try /dev/cdrom1
--> OK

Another trick may be to unplug it, boot,
and then pulg it in and during autodectct
the icon may be created. Sorry I have not
tested this.

A CDRW is a great addition to a KNOPPIX box.
It may be used to backup you persistent home.
I have suggeste a script for this in Tips and Tricks.

Best Wishes
paradocs

[aay]

Try this.

Change the following line in /etc/fstab

/dev/cdrom1 /cdrom1 auto user,noauto,exec,ro 0 0

to

/dev/scd1 /cdrom iso9660 defaults,ro,user,noexec,noauto 0 0

You should then be able do to a "mount /cdrom" and "cd /cdrom", and "ls" to see the contents of your cd.

You should then be able to follow the advice of paradocs regarding making a icon on the desktop.

[bilzer]

Changed /etc/fstab to:
/dev/scd1 /cdrom iso9660 defaults,ro,user,noexec,noauto 0 0
mount /cdrom showed "no medium found:
Changed /etc/fstab to use /cdrom1 instaed of /cdrom
mount /cdrom1 showed "no cdrom1 in fstab......"

Also - when running from knoppix disk, the device appears in Control Center>Information>USB Devices.( and also in SCSI list)
When running from installed version, it appears only in the SCSI list.
The USB devices only show the root stuff.
I'm wondering if there isnt required modprobe or something to activate the USB?

[aay]

I'm sorry I made a stupid mistake.

I told you to do this:

"/dev/cdrom1 /cdrom1 auto user,noauto,exec,ro 0 0

to

/dev/scd1 /cdrom iso9660 defaults,ro,user,noexec,noauto 0 0"

but I should have told you to change it to:

/dev/scd1 /cdrom1 iso9660 defaults,ro,user,noexec,noauto 0 0

The command you should use to mount would then be mount /cdrom1.

The change is from /cdrom to /cdrom1

Sorry about the confusion. I should have read my post a little more carefully.

Also make sure you've got a cd in the drive before you try and mount it.

Hopefully it should work this time.

[bilzer]

Sorry to say -
/dev/scd1 /cdrom1 iso9660 defaults,ro,user,noexec,noauto 0 0
doesnt get it either. It can't find mount for cdrom1.
Adding /mnt/cdrom1 doesnt work either.

If you have usb2, are your devices showing up in Control Center>Information>USB?
As mentioned earlier, mine only show when running from knoppix cd.
Also, USB hotplug shows up when running from knoppix cd, no mention of it with dmesg from the install.

[Stephen]

Sorry to say -
/dev/scd1 /cdrom1 iso9660 defaults,ro,user,noexec,noauto 0 0
doesnt get it either. It can't find mount for cdrom1.
Adding /mnt/cdrom1 doesnt work either.

If you have usb2, are your devices showing up in Control Center>Information>USB?
As mentioned earlier, mine only show when running from knoppix cd.
Also, USB hotplug shows up when running from knoppix cd, no mention of it with dmesg from the install.

Does the mount point /cdrom1 actually exist on your system? eg have you done mkdir /cdrom1. Also have you checked lsmod on the install to see if the module for usb2 is being loaded at boot ( I believe it's ehci)?