Trouble mounting USB

[mschersten]

I just got a new mp3 player, a Cowon iAudio U2. At my desktop, I get cryptic messages, but it doesn't want to mount. I have no other usb problems; keyboard, mouse, printer, camera, usb storage all work fine. Here's the output of dmesg after plugging it in:

[74118.472044] usb 2-2: new full speed USB device using uhci_hcd and address 7
[74118.676673] usb 2-2: configuration #1 chosen from 1 choice
[74118.712131] scsi7 : SCSI emulation for USB Mass Storage devices
[74118.713809] usb-storage: device found at 7
[74118.713821] usb-storage: waiting for device to settle before scanning
[74123.713296] usb-storage: device scan complete
[74123.717270] scsi 7:0:0:0: Direct-Access     COWON    iAUDIO U2        0100 PQ: 0 ANSI: 4
[74123.736216] sd 7:0:0:0: [sdb] 1025152 2048-byte hardware sectors (2100 MB)
[74123.740206] sd 7:0:0:0: [sdb] Write Protect is off
[74123.740223] sd 7:0:0:0: [sdb] Mode Sense: 3e 00 00 00
[74123.740230] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[74123.794273] sd 7:0:0:0: [sdb] 1025152 2048-byte hardware sectors (2100 MB)
[74123.797620] sd 7:0:0:0: [sdb] Write Protect is off
[74123.797640] sd 7:0:0:0: [sdb] Mode Sense: 3e 00 00 00
[74123.797647] sd 7:0:0:0: [sdb] Assuming drive cache: write through
[74123.798915]  sdb: sdb1
[74123.812659] sd 7:0:0:0: [sdb] Attached SCSI removable disk
[74123.813732] sd 7:0:0:0: Attached scsi generic sg2 type 0
[74124.420033] usb 2-2: reset full speed USB device using uhci_hcd and address 7
[74124.692034] usb 2-2: reset full speed USB device using uhci_hcd and address 7
[74124.960031] usb 2-2: reset full speed USB device using uhci_hcd and address 7
[74125.228044] usb 2-2: reset full speed USB device using uhci_hcd and address 7
[74125.504048] usb 2-2: reset full speed USB device using uhci_hcd and address 7
[74125.768029] usb 2-2: reset full speed USB device using uhci_hcd and address 7
[74125.917864] sd 7:0:0:0: [sdb] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK
[74125.917888] end_request: I/O error, dev sdb, sector 4100596
[74125.917903] Buffer I/O error on device sdb, logical block 512574
[74126.036046] usb 2-2: reset full speed USB device using uhci_hcd and address 7
[74126.312065] usb 2-2: reset full speed USB device using uhci_hcd and address 7

etc...

I can see it recognizes it, and wants to mount it at sdb. But it does work with my laptop. I plug it in, it mounts automatically, everything happens like it should. Here's dmesg from the laptop:

[  673.144000] usb 1-1: new full speed USB device using uhci_hcd and address 2
[  673.308000] usb 1-1: configuration #1 chosen from 1 choice
[  673.528000] usbcore: registered new interface driver libusual
[  673.640000] Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
[  673.640000] ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
[  673.696000] Initializing USB Mass Storage driver...
[  673.696000] scsi2 : SCSI emulation for USB Mass Storage devices
[  673.700000] usb-storage: device found at 2
[  673.700000] usb-storage: waiting for device to settle before scanning
[  673.700000] usbcore: registered new interface driver usb-storage
[  673.700000] USB Mass Storage support registered.
[  678.700000] usb-storage: device scan complete
[  678.704000] scsi 2:0:0:0: Direct-Access     COWON    iAUDIO U2        0100 PQ: 0 ANSI: 4
[  678.708000] sd 2:0:0:0: [sdb] 1025152 2048-byte hardware sectors (2100 MB)
[  678.712000] sd 2:0:0:0: [sdb] Write Protect is off
[  678.712000] sd 2:0:0:0: [sdb] Mode Sense: 3e 00 00 00
[  678.712000] sd 2:0:0:0: [sdb] Assuming drive cache: write through
[  678.720000] sd 2:0:0:0: [sdb] 1025152 2048-byte hardware sectors (2100 MB)
[  678.724000] sd 2:0:0:0: [sdb] Write Protect is off
[  678.724000] sd 2:0:0:0: [sdb] Mode Sense: 3e 00 00 00
[  678.724000] sd 2:0:0:0: [sdb] Assuming drive cache: write through
[  678.724000]  sdb: sdb1
[  678.732000] sd 2:0:0:0: [sdb] Attached SCSI removable disk
[  678.732000] sd 2:0:0:0: Attached scsi generic sg2 type 0

and I think that these are the lines that I should learn something from:

[  673.528000] usbcore: registered new interface driver libusual
[  673.640000] Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
[  673.640000] ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
[  673.696000] Initializing USB Mass Storage driver...

Here's lsusb:

michael@michael-desktop:~$ lsusb
Bus 002 Device 010: ID 0e21:0600 Cowon Systems, Inc. 
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 003: ID 413c:2003 Dell Computer Corp. Keyboard
Bus 001 Device 002: ID 09da:0006 A4 Tech Co., Ltd Optical Mouse WOP-35 / Trust 450L Optical Mouse
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

I created a directory in /media:

michael@michael-desktop:~$ ls /media/
cdrom  cdrom0  mp3

Here are my attempts at mounting it:

michael@michael-desktop:~$ sudo mount /dev/sdb /media/mp3
mount: /dev/sdb is not a valid block device
michael@michael-desktop:~$ sudo mount /dev/sdb1 /media/mp3
mount: special device /dev/sdb1 does not exist

It also doesn't show up on fdisk or in

ls -l /dev/disk/by-uuid/

Here's some other stuff:

michael@michael-desktop:~$ modprobe usbcore
michael@michael-desktop:~$ modprobe -r usbcore
FATAL: Module usbcore is in use.

michael@michael-desktop:~$ lsmod | grep usb
usb_storage            82752  0 
usblp                  20480  0 
libusual               30356  1 usb_storage
usbhid                 35840  0 
hid                    50560  1 usbhid
usbcore               149360  6 usb_storage,usblp,libusual,usbhid,uhci_hcd
scsi_mod              155212  5 usb_storage,sr_mod,sd_mod,sg,libata

Any ideas?

[mschersten]

Ok, so I tried with Knoppix, and I'm still having problems, so it's not an Ubuntu issue. Can anyone tell if this is a hardware issue with my computer?

[sahabcse]

Hi

I think it may be the USB issue, Could you please try to mount it on another OS like windows. If its mount there means usb has no issue. Also check with another computer. some time it may be the usb connector issue.
In which version ubuntu you have installed, In Ubuntu 8.10 has some bugs for mounting mobile disk but USB drive mount perfect................

[devils casper]

What is the output of sudo fdisk -l command?

[mschersten]

The only OS I have on the computer I'm having trouble with is Ubuntu. I have tried it on a different Windows machine, and a laptop running an older version of Ubuntu (7.10?8.04? I'll have to double check). I'm running 8.10 on this computer that's giving me trouble, but I get the same results if I boot from a Knoppix live cd.

michael@michael-desktop:~$ sudo fdisk -l

Disk /dev/sda: 20.4 GB, 20491075584 bytes
255 heads, 63 sectors/track, 2491 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x39f539f4

   Device Boot      Start         End      Blocks   Id  System
/dev/sda2   *           1        2491    20008926    5  Extended
/dev/sda5            2387        2491      843412+  82  Linux swap / Solaris
/dev/sda6             602        2386    14337981   83  Linux
/dev/sda7               1         600     4819405+  83  Linux

Partition table entries are not in disk order

[mschersten]

Over at Ubuntu forums, some one pointed me to Reset high speed USB device ??? OBSIDIANLAKE, and to have me try

sudo rmmod uhci_hcd

But that rendered my usb mouse and keyboard useless, and when I rebooted, uhci_hcd was back:

michael@michael-desktop:~$ lsmod | grep usbcore
usbcore               149360  5 usb_storage,libusual,usbhid,uhci_hcd