usbkey only works once after boot

jkobrien · 10-20-2004, 07:09 AM

Hi LQers,

I'm running Slackware 10, with custom compiled kernel 2.6.7

If I boot up with a usbkey in the usb slot I can mount and unmount it to my heart's content, but if I unplug it (after unmounting it) and then replug and try to mount it, I get...

mount: special device /dev/sdb1 does not exist

I've compiled in all the things you're supposed to (usbcore, usb-uhci, usb-storage, scsi_mod, sg, sd_mod) and also udev.

The relevant line of fstab is...

/dev/sdb1 /mnt/usbkey vfat noauto,user 0 0

The command lsusb gives me the following output...

Bus 004 Device 002: ID 08ec:0012 M-Systems Flash Disk Pioneers
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 003: ID 046d:c00c Logitech, Inc. Optical Wheel Mouse
Bus 001 Device 001: ID 0000:0000

I don't know how to interpret this. Does it mean that sdb1 is the wrong entry in fstab?

Any help would be much appreciated,

John

0.o · 10-20-2004, 07:12 AM

After you stick it back in is it still known as sdb1? dmesg | grep sd .

jkobrien · 10-21-2004, 07:21 AM

I get...

Attached scsi removable disk sdb at scsi2, channel 0, id 0, lun 0
Attached scsi removable disk sdb at scsi3, channel 0, id 0, lun 0

Does this mean that I should be using sdb2? There's no such device under /dev though.

Thanks,

John

jkobrien · 10-28-2004, 05:50 AM

jkobrien · 11-23-2004, 11:40 AM

Hi,

I found the problem, but not the solution...

when I plug the stick in, the following appears at the end of /var/log/messages:

Code:

Nov 23 17:25:09 pharm87 kernel: usb 1-6: new high speed USB device using address 6
Nov 23 17:25:09 pharm87 kernel: usb 1-6: Product: disgo
Nov 23 17:25:09 pharm87 kernel: usb 1-6: Manufacturer: M-Sys
Nov 23 17:25:09 pharm87 kernel: usb 1-6: SerialNumber: 1781413425000B20
Nov 23 17:25:09 pharm87 kernel: scsi5 : SCSI emulation for USB Mass Storage devices
Nov 23 17:25:10 pharm87 kernel:   Vendor:           Model: disgo             Rev: 4.70
Nov 23 17:25:10 pharm87 kernel:   Type:   Direct-Access                      ANSI SCSI revision: 02
Nov 23 17:25:10 pharm87 kernel: Attached scsi removable disk sdb at scsi5, channel 0, id 0, lun 0
Nov 23 17:25:10 pharm87 scsi.agent[3730]: disk at /devices/pci0000:00/0000:00:1d.7/usb1/1-6/1-6:1.0/host5/5:0:0:0
Nov 23 17:25:10 pharm87 modprobe: FATAL: Module sd_mod not found.
Nov 23 17:25:10 pharm87 usb.agent[3716]: ... no modules for USB product 8ec/12/200
Nov 23 17:25:10 pharm87 udev[3793]: creating device node '/dev/sdb'

So, it's not finding the scsi disk support module. Now, I have this built into the kernel and, according to the docs, can't have it as a module because my root file system is on a scsi hard disk.

Any and all suggestions gratefully received...

John

cyberhawk · 12-06-2004, 04:37 AM

stop and restart your hotplug service
with
/etc/rc.d/rc.hotplug stop
and then
/etc/rc.d/rc.hotplug start

this should fix it

jkobrien · 01-06-2005, 05:41 AM

In case someone with a similar problem stumbles across this thread, I fixed it by upgrading the kernel to 2.6.10

Also, I made the following .config changes (which possibly would have fixed my problem without the kernel upgrade):

CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_OHCI_HCD=y

Now I can unplug and replug all I want, and have no problem reading my memory stick, my mp3 player or my digitial camera all through my usb port.

John