problems mounting with 2.6.3

kierse · 02-21-2004, 02:08 AM

Ever since I upgraded my kernel to 2.6.X from 2.4.XX I haven't been able to mount my cdrom (which is actually a CDRW/DVD combo) and my usb flash drive. I've been searching through the forums and haven't been able to find a solution to either problem.

First I'll start with the cdrom:
------------------------------------
- scsi emulation is included in the kernel
- kernel detects drive on boot but also returns an error:

Code:

dmesg:
hdc: QSI CD-RW/DVD-ROM SBW-242, ATAPI CD/DVD-ROM drive
ide-scsi: unsup command: dev hdc: flags = REQ_CMD REQ_STARTED 
end_request: I/O error, dev hdc, sector 0

- when I try to mount the drive using "mount /mnt/cdrom" I get the following message:
mount: /dev/cdrom is not a valid block device
- for some reason, /dev/cdrom links to /dev/sr0 instead of /dev/hdc

Code:

$>ls -la /dev/cdrom 
lrwxrwxrwx    1 root     root            8 Nov 30 16:41 /dev/cdrom -> /dev/sr0

USB flash drive
-------------------
-kernel detects usb device ONLY at boot, if I remove it and reinsert the device the kernel doesn't detect it.
- dmesg returned the following:

Code:

usb 2-1: new full speed USB device using address 2
Initializing USB Mass Storage driver...
scsi1 : SCSI emulation for USB Mass Storage devices
  Vendor: Verbatim  Model: USB Drive         Rev: 2.00
  Type:   Direct-Access                      ANSI SCSI revision: 02
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 2
drivers/usb/core/usb.c: registered new driver usb-storage
USB Mass Storage support registered.

-fdisk -l doesn't list the usb device
-when I try to mount the device on /dev/sda or /dev/sda1 I get the same message as with the cdrom:
mount: /dev/sda1 is not a valid block device

Any ideas concerning either problem would be great. I'm running Slackware 9.1 with kernel 2.6.3

Thanks
Kierse

spuzzzzzzz · 02-21-2004, 05:46 AM

First of all, you don't need scsi-emulation any more. Recent versions of burning apps (cdrecord and cdrdao) support writing to ATAPI drives. Remove the scsi-emulation from your kernel and change the "hdX=ide-scsi" boot parameter to "hdX=ide-cdrom"
The reason /dev/cdrom doesn't point to /dev/hdc is because of the scsi-emulation; /dev/hdc is an IDE drive.

With the USB drive, try "lsusb" to check if its getting detected. You could also try removing and then reinserting the USB kernel modules.

kierse · 02-21-2004, 04:34 PM

Thanks Spuzzzzzzz,

I removed scsi emulation support and I can now mount my cdrom drive. I haven't tried burning a
disc or watching a dvd yet but at least I have basic cdrom support. I had to remove the symbolic link /dev/cdrom -> /dev/sr0 and create a new one pointing to /dev/hdc

I still can't mount my usb flash drive yet. Using lsusb I get the following:

Code:

lsusb:
Unknown line at line 1809
Duplicate HUT Usage Spec at line 2650
Bus 003 Device 001: ID 0000:0000 Virtual Hub
Bus 002 Device 002: ID 0ea0:2168  
Bus 002 Device 001: ID 0000:0000 Virtual Hub
Bus 001 Device 001: ID 0000:0000 Virtual Hub

I also tried reloading the usb-storage module but that didn't work. Any more ideas?

Kierse

spuzzzzzzz · 02-21-2004, 04:52 PM

I'm afraid i'm a bit of a noob on usb matters, but a couple hints for the cd burning:
1) upgrade cdrdao to version 1.1.8 or better and use the option "--device ATAPI:0,0,0"
2) upgrade cdrecord/cdrtools to 2.05 or better and use "dev=ATAPI:0,0,0"

snop · 02-21-2004, 08:22 PM

Hi all,

For USB mounting check this out:
http://www.linuxquestions.org/questi...hreadid=138791

I don't know if this may be your problem but something's wrong in 2.6.x series and USB + mass storage devices. It seems that both Windows and some devices don't follow some USB communication protocol commands in the proper way (or maybe it's just a kernel bug...).

As spuzzzzzzz says you'll need a beta version of cdrdao if you want to use it (you'll find one at www.linuxpackages.org).

You'll need a beta version of cdrtools if you want to use some K3b capabilities i.e.: clone disk. I don't remember where I found the package for it. But the version installed by default will work without scsi emulation "out of the box".

Hope all this helps.

Bye

SnOp

kierse · 02-21-2004, 10:41 PM

thanks snop,

I read the post you listed and I think I'll give the patch a try and see if it fixes my problem. I'll let you know how it works

Kierse

kierse · 02-22-2004, 12:43 PM

I tried the patch but that didn't seem to work. The patch seems to be designed
for usb digital cameras and I guess it doesn't work with usb mass storage devices. Oh well, hopefully it will be fixed in future kernel releases...

Thanks for your help everyone
kierse

jimdaworm · 02-22-2004, 04:10 PM

Hey kierse I thought that most digital cameras were treated as mass storage devices in linux? At least mine was before I haven´t tried since I bought the new computer and installed 2.6.3

Adam

kierse · 02-22-2004, 05:16 PM

that could be, I don't know. My device is a usb flash drive and the patch I tried was given as a solution to a problem with digital cameras. In any case it didn't work so I'll keep on trying.

Maybe I'll post a new thread about the problem and see what it stirs up

Thanks
Kierse