No medium found???

dinolinux · 08-01-2005, 09:35 AM

Hi!

I asked this question a few weeks ago, but it died away...

When I try to mount a USB device, I keep getting an error saying that no medium is found. I have plugged in my device and emerged all the usb utilities that are available. I'm using Gentoo 2005.0

Do you need output of any commands or do you need me to post a config file? Just ask!

Matir · 08-01-2005, 09:41 AM

Do you have the scsi generic, scsi disk, and usb modules? Does it show up in dmesg?

dinolinux · 08-01-2005, 09:45 AM

My dmesg | grep usb looks like this:

Code:

usbcore: registered new driver usbfs
usbcore: registered new driver hub
usb 1-2: new low speed USB device using ohci_hcd and address 3
usbcore: registered new driver hiddev
input: USB HID v1.10 Mouse [Logitech USB Receiver] on usb-0000:00:03.0-2
usbcore: registered new driver usbhid
drivers/usb/input/hid-core.c: v2.0:USB HID core driver
usb 3-5: new high speed USB device using ehci_hcd and address 3
usbcore: registered new driver usb-storage
usb-storage: device found at 3
usb-storage: waiting for device to settle before scanning
usb-storage: device scan complete
usb 3-5: USB disconnect, address 3
usb 3-5: new high speed USB device using ehci_hcd and address 4
usb-storage: device found at 4
usb-storage: waiting for device to settle before scanning
usb-storage: device scan complete
usb 3-5: USB disconnect, address 4

My dmesg | grep scsi:

Code:

scsi0 : SCSI host adapter emulation for IDE ATAPI devices
Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0
Attached scsi generic sg0 at scsi0, channel 0, id 0, lun 0,  type 0
scsi1 : SCSI emulation for USB Mass Storage devices
 /dev/scsi/host1/bus0/target0/lun0: p1
Attached scsi removable disk sdb at scsi1, channel 0, id 0, lun 0
Attached scsi generic sg1 at scsi1, channel 0, id 0, lun 0,  type 0
scsi: unknown opcode 0x01
scsi2 : SCSI emulation for USB Mass Storage devices
 /dev/scsi/host2/bus0/target0/lun0: p1
Attached scsi removable disk sdc at scsi2, channel 0, id 0, lun 0
Attached scsi generic sg1 at scsi2, channel 0, id 0, lun 0,  type 0

Matir · 08-01-2005, 12:13 PM

It looks like it's /dev/sdc in this case. Try 'fdisk -l /dev/sdc' to see if it shows the partition table there.

dinolinux · 08-01-2005, 12:22 PM

# fdisk -l /dev/sdc
# fdisk /dev/sdc

Unable to open /dev/sdc

Matir · 08-01-2005, 12:28 PM

Are you root when you do that? And dmesg shows it at hdc?

dinolinux · 08-01-2005, 01:35 PM

I only have one hard drive, so I don't have any hdc. And yes I'm root

Matir · 08-01-2005, 01:38 PM

Sorry, I meant sdc. My bad.

dinolinux · 08-01-2005, 01:56 PM

I don't have any sdc either as I said earlier! What do I do now?

Matir · 08-01-2005, 02:16 PM

Well, your 'dmesg' output showed the usb drive being recognized as sdc.

Quote:

Attached scsi removable disk sdc at scsi2, channel 0, id 0, lun 0

dinolinux · 08-01-2005, 02:20 PM

# mount -t vfat /dev/sdc1 /mnt/usbdrive
mount: special device /dev/sdc1 does not exist
#

???

Matir · 08-01-2005, 02:33 PM

If you've unplugged and replugged it, the drive letter may have changed. Try 'dmesg | grep sd'.

dinolinux · 08-02-2005, 03:47 AM

dmesg | grep sd:

Code:

Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0
SCSI device sdb: 506880 512-byte hdwr sectors (260 MB)
sdb: assuming Write Enabled
sdb: assuming drive cache: write through
SCSI device sdb: 506880 512-byte hdwr sectors (260 MB)
sdb: assuming Write Enabled
sdb: assuming drive cache: write through
Attached scsi removable disk sdb at scsi1, channel 0, id 0, lun 0

Matir · 08-02-2005, 10:21 AM

At this point, it's being attached as disk 'sdb'.