need help with HP cdwriter 8200 Plus

#1 bernard

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Posted 21 May 2004 - 10:51 PM

Hi there !

This cd burner is listed as linux compatible. As for details, it just says: "Just plug it in and it works without further configuration under RedHat 7.1, usually as SCSI device 0,0,0"

I am trying to operate this roaster on my IBM Thinkpad 600 with RedHat 7.2, but I don't know how. After I had plugged this cdwriter on the USB port, the /var/log/messages file got incremented with the lines below:

localhost kernel: usb.c: USB new device connect on bus 1/1, assigned device number 2

localhost kernel: usb.c USB device 2 (vend/prod/ 0x3f0/0x107) is not claimed by any active driver

localhost kernel: SCSI subsystem druver Revision: 1.00

localhost kernel: Initializing USB Mass Storage Driver

localhost kernel: usb.c: registered new driver usb-storage

localhost kernel: scsi0: SCSI emulation for USB Mass Storage Devices

localhost kernel: USB Mass Storage support registered

*********

Now, where do I go from there ? I have, by just guessing, tried to mount a device, doing like this:

mount /dev/sda1 /mnt/cdwriter... up to sda5, and none of the sda devices were reckognized.

In any case, how am I to use this cdwriter ? Shall I have to use Xcdroast as I do on my old desk machine (RedHat 6.0 and an old SCSI burner) ? Or shall I be able to directly write files to the device filesystem ?

Thanks for any help

#2 danleff

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Posted 22 May 2004 - 02:00 AM

Try the following, with a cdrom in the drive;

mount -r -t iso9660 /dev/sr0 /mnt/cdwriter

assuming that you have a directory in /mnt called cdwriter.

If you get no errors, see if it can read the inserted cd;

ls -l /mnt/cdwriter

#3 bernard

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Posted 22 May 2004 - 11:17 AM

Originally posted by danleff:

Quote:

Try the following, with a cdrom in the drive;

mount -r -t iso9660 /dev/sr0 /mnt/cdwriter

assuming that you have a directory in /mnt called cdwriter.

Here is the reply I got:

[root@localhost bd]# mount -r -t iso9660 /dev/sr0 /mnt/cdwriter
mount: special device /dev/sr0 does not exist

If you get no errors, see if it can read the inserted cd;

ls -l /mnt/cdwriter

#4 danleff

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Posted 22 May 2004 - 02:29 PM

So much for a simple solution.

Where did you see an article or directions that the driver would work on hotplug?

Look at the following page for a troubleshooting list;

http://www.dragoninc.on.ca/mail-archives/linux-usb/2001-04/0198.html

Now we will dig further. At a console prompt, type in, as per the article

cdrecord -scanbus

To see if the scsi device is recognized. If it is, note the location as 0,0,0 or whatever it is.

Then (if it is);

tail /var/log/messages and see if you see the expected messages in the run (example - yours may be slightly different);

Apr 23 22:25:56 localhost kernel: Product: HP USB CD-Writer Plus
Apr 23 22:25:59 localhost kernel: scsi0 : SCSI emulation for USB Mass Storage devices
Apr 23 22:25:59 localhost kernel: Vendor: HP Model: CD-Writer+ 8200f Rev: 1.0A
Apr 23 22:25:59 localhost kernel: Type: CD-ROM ANSI SCSI revision: 02
Apr 23 22:25:59 localhost kernel: Detected scsi CD-ROM sr0 at scsi0, channel 0, id 0, lun 0
Apr 23 22:25:59 localhost kernel: usb-storage: Command will be truncated to fit in SENSE6 buffer.
Apr 23 22:25:59 localhost kernel: usb-storage: Command will be truncated to fit in SENSE6 buffer.
Apr 23 22:25:59 localhost kernel: sr0: scsi3-mmc drive: 168x/0x writer dvd-ram cdda caddy

Note the scsi device sr0 in this case.

If not try the more /proc/bus/usb/drivers command and see what drivers are loading.

Let us know what you find.

Then we will go from there.

#5 bernard

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Posted 22 May 2004 - 07:31 PM

Originally posted by danleff:

Quote:

So much for a simple solution.

Where did you see an article or directions that the driver would work on hotplug?

It was on the 'linuxcompatible' data, for the HP cdwriter 8200 usb. Besides, upon plugging the usb cable, new lines get written in /var/log/messages as stated in my first post

Look at the following page for a troubleshooting list;

http://www.dragoninc.on.ca/mail-archives/linux-usb/2001-04/0198.html

Now we will dig further. At a console prompt, type in, as per the article

cdrecord -scanbus

To see if the scsi device is recognized. If it is, note the location as 0,0,0 or whatever it is.

It is NOT ! a call on cdrecord -scanbus gives the following reply: "Cannot open SCSI drivers"

below, are the relevant lines that are in my /var/log/dmesg file:

usb.c: registered new driver usbdevfs
usb.c: registered new driver hub
usb-uhci.c: $Revision: 1.259 $ time 17:36:49 Sep 6 2001
usb-uhci.c: High bandwidth mode enabled
PCI: Found IRQ 11 for device 00:07.2
usb-uhci.c: USB UHCI at I/O 0x8400, IRQ 11
usb-uhci.c: Detected 2 ports
usb.c: new USB bus registered, assigned bus number 1
hub.c: USB hub found
hub.c: 2 ports detected
usb-uhci.c: v1.251:USB Universal Host Controller Interface driver

and now, the relevant lines in the tail of /var/log/messages:

May 22 18:39:37 localhost kernel: hub.c: USB new device connect on bus1/1, assigned device number 2
May 22 18:39:37 localhost kernel: usb.c: USB device 2 (vend/prod 0x3f0/0x107) is not claimed by any active driver.
May 22 18:39:41 localhost kernel: Initializing USB Mass Storage driver...
May 22 18:39:41 localhost kernel: usb.c: registered new driver usb-storage
May 22 18:39:41 localhost kernel: scsi0 : SCSI emulation for USB Mass Storage devices
May 22 18:39:41 localhost kernel: USB Mass Storage support registered.

Then (if it is);

tail /var/log/messages and see if you see the expected messages in the run (example - yours may be slightly different);

Apr 23 22:25:56 localhost kernel: Product: HP USB CD-Writer Plus
Apr 23 22:25:59 localhost kernel: scsi0 : SCSI emulation for USB Mass Storage devices
Apr 23 22:25:59 localhost kernel: Vendor: HP Model: CD-Writer+ 8200f Rev: 1.0A
Apr 23 22:25:59 localhost kernel: Type: CD-ROM ANSI SCSI revision: 02
Apr 23 22:25:59 localhost kernel: Detected scsi CD-ROM sr0 at scsi0, channel 0, id 0, lun 0
Apr 23 22:25:59 localhost kernel: usb-storage: Command will be truncated to fit in SENSE6 buffer.
Apr 23 22:25:59 localhost kernel: usb-storage: Command will be truncated to fit in SENSE6 buffer.
Apr 23 22:25:59 localhost kernel: sr0: scsi3-mmc drive: 168x/0x writer dvd-ram cdda caddy

Note the scsi device sr0 in this case.

In my case, scsi0 : "SCSI emulation for USB Mass Storage devices" without any mention of the device sr0 or anything else.

If not try the more /proc/bus/usb/drivers command and see what drivers are loading.

Let us know what you find.

Then we will go from there.

#6 bernard

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Posted 22 May 2004 - 07:57 PM

Originally posted by bernard:

Quote:

Originally posted by danleff:

Quote:

#7 danleff

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Posted 23 May 2004 - 12:56 PM

Oh ohh! No scsi drivers. Let's try one thing. I was not sure if this was needed.

At a command prompt, as root, type in modprobe ide-scsi.

Then try the cdrecord -scanbus command. See if you get no errors from the ide-scsi command (the screen just returns back to the command prompt with no errors) and if so, if the cdrecord -scanbus shows the drive.

I actually have one of these HP drives and can try it and see. The issue is that my dstro's will have ide-scsi already loaded, so it may not mimic your problems.