On (x)Ubuntu 9.04, usb hard drive isn't listed in /dev/sd*, yet seen by lsusb.

cfp · 07-25-2009, 10:03 AM

Hello world :)

Summary : On my (x)ubuntu installation, on an external hard drive, other usb hard drives do not appear in /dev, although they appear in lsusb output, and can't be mounted. It seems to be a problem with the order in which devices are listed.

Details : I'm using XUbuntu 9.04, which I just installed (I was running ubuntu and I had the same problem). The system is installed on an external usb hard drive. When I connected my music player (Toshiba Giabeat F), it was first detected and auto-mounted, but then disappeared. It does not appear in /dev, and yet lsusb can find it. On ubuntu, if the system drive was plugged in the front usb plugs and my player in the back, the system would crash (the system drived was remounted to another location).
The drive is clean and works without problems in windows.

Additional info :
lsusb, player unplugged (underlined : system drive) :

Code:

Bus 001 Device 004: ID 1058:0701 Western Digital Technologies, Inc. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 002: ID 04fc:0003 Sunplus Technology Co., Ltd CM1092 Optical Scroller Mouse
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 002: ID 056a:0015 Wacom Co., Ltd 
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

lsusb, player plugged (the system drive is second) :

Code:

Bus 001 Device 012: ID 0930:0009 Toshiba Corp. Gigabeat F/X (HDD audio player)
Bus 001 Device 004: ID 1058:0701 Western Digital Technologies, Inc. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 002: ID 04fc:0003 Sunplus Technology Co., Ltd CM1092 Optical Scroller Mouse
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 002: ID 056a:0015 Wacom Co., Ltd 
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

fdisk -l

Code:

Disque /dev/sda: 160.0 Go, 160000000000 octets
255 têtes, 63 secteurs/piste, 19452 cylindres
Unités = cylindres de 16065 * 512 = 8225280 octets
Identifiant de disque : 0xe335e335

Périphérique Amorce  Début        Fin      Blocs     Id  Système
/dev/sda1   *           1       19451   156240126    7  HPFS/NTFS

Disque /dev/sdb: 250.0 Go, 250059350016 octets
255 têtes, 63 secteurs/piste, 30401 cylindres
Unités = cylindres de 16065 * 512 = 8225280 octets
Identifiant de disque : 0x0b3ae5b2

Périphérique Amorce  Début        Fin      Blocs     Id  Système
/dev/sdb1               1       30401   244196001    7  HPFS/NTFS

Disque /dev/sdc: 80.0 Go, 80026361856 octets
255 têtes, 63 secteurs/piste, 9729 cylindres
Unités = cylindres de 16065 * 512 = 8225280 octets
Identifiant de disque : 0xddb2a95f

Périphérique Amorce  Début        Fin      Blocs     Id  Système
/dev/sdc1               1        9698    77899153+   5  Etendue
/dev/sdc4            9699        9729      249007+  82  Linux swap / Solaris
/dev/sdc5               1        2432    19534977   83  Linux
/dev/sdc6            2433        6079    29294496   83  Linux
/dev/sdc7            6080        9698    29069586    b  W95 FAT32

dmesg (some errors on first plug (when the drive was auto-mounted) :

Code:

[  320.950693] FAT: Directory bread(block 53327730) failed
(...)
[  320.950850] FAT: Directory bread(block 53327749) failed
(...)
[  320.951047] FAT: Directory bread(block 53327773) failed
[  356.880015] usb 1-3: new high speed USB device using ehci_hcd and address 6
[  357.013032] usb 1-3: configuration #1 chosen from 1 choice
[  357.080375] scsi8 : SCSI emulation for USB Mass Storage devices
[  357.084445] usb-storage: device found at 6
[  357.084448] usb-storage: waiting for device to settle before scanning
[  540.458430] usb 1-3: USB disconnect, address 6
[  540.568016] usb 1-8: reset high speed USB device using ehci_hcd and address 4
[  558.524015] usb 1-1: new high speed USB device using ehci_hcd and address 7
[  558.692319] usb 1-1: configuration #1 chosen from 1 choice
[  558.732056] scsi9 : SCSI emulation for USB Mass Storage devices
[  558.732323] usb-storage: device found at 7
[  558.732326] usb-storage: waiting for device to settle before scanning
[  752.242930] usb 1-1: USB disconnect, address 7
(...)
[18793.100017] usb 1-7: new high speed USB device using ehci_hcd and address 12
[18793.272039] usb 1-7: configuration #1 chosen from 1 choice
[18793.316035] scsi14 : SCSI emulation for USB Mass Storage devices
[18793.316311] usb-storage: device found at 12
[18793.316313] usb-storage: waiting for device to settle before scanning

I do wish someone could help me. Thanks for reading all this anyway :)
CFP.

cfp · 07-28-2009, 04:10 PM

The problem is related to a bug in libgphoto, using MTP. Some devices are detected as audio players and yet accessed through MTP, even if the don't support this protocol. The solution is to be found here : https://bugs.launchpad.net/ubuntu/+s...ux/+bug/355998 .
CFP.