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Old 02-06-2005, 01:25 AM   #1
LQ Newbie
Registered: Feb 2005
Distribution: Fedora Core 3
Posts: 2

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can't read from USB removable device

Hi everyone,

I'm having a problem with my USB magnet optical drive
installed on my PC running Fedora Core 3.
It seems mounting was done successfully because I can
see two folders on the disk by using file browser.
But if I try to open one of these folder from file browser
or terminal, they stop responding.

Does anyone have idea for this?

here is the setting.

usb 3-2: new full speed USB device using address 2
scsi1 : SCSI emulation for USB Mass Storage devices
Vendor: FUJITSU Model: MCN3064UA Rev: 0011
Type: Direct-Access ANSI SCSI revision: 02
USB Mass Storage device found at 2
SCSI device sdb: 446325 512-byte hdwr sectors (229 MB)
sdb: Write Protect is off
sdb: Mode Sense: 2b 03 00 08
sdb: assuming drive cache: write through
sdb: unknown partition table
Attached scsi removable disk sdb at scsi1, channel 0, id 0, lun 0

#cat /etc/fstab
# This file is edited by fstab-sync - see 'man fstab-sync' for details
/dev/VolGroup00/LogVol00 / ext3 defaults 1 1
LABEL=/boot /boot ext3 defaults 1 2
none /dev/pts devpts gid=5,mode=620 0 0
none /dev/shm tmpfs defaults 0 0
none /proc proc defaults 0 0
none /sys sysfs defaults 0 0
/dev/VolGroup00/LogVol01 swap swap defaults 0 0
/dev/hdc /media/cdrecorder auto pamconsole,fscontext=system_ubject_r:removable_t,ro,exec,noauto,managed 0 0
/dev/sdb /media/usbdisk vfat pamconsole,noatime,sync,fscontext=system_ubject_r:removable_t,exec,noauto,managed 0 0
/dev/fd0 /media/floppy auto pamconsole,fscontext=system_ubject_r:removable_t,exec,noauto,managed 0 0

Old 02-06-2005, 09:00 AM   #2
Senior Member
Registered: Mar 2004
Location: Munich
Distribution: SuSE, Ubuntu
Posts: 3,513

Rep: Reputation: 58
Hotplug doesn't seem to recognize any partitions on the drive. Maybe it helps to create a partition and filesystem.

Also in /etc/fstab you try to mount the drive /dev/sdb instead of a particular partition. Try /dev/sdb1 instead. You may also change 'vfat' to 'auto'.
Old 02-07-2005, 09:37 PM   #3
LQ Newbie
Registered: Feb 2005
Distribution: Fedora Core 3
Posts: 2

Original Poster
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Hi abisko00,

Thanks for your help!

I tried "/dev/sdb1" but it seems the problem remains...

Meanwhile, I tried a bunch of other disks I have and found some of them are accessible without any changes to the fstab or parition. (Of course I made sure all of them are accessible on Windows 2000.)

It's odd because all of them are formatted in same format (FAT16, no partition) although I am not sure when and how I formatted them.

I am guessing that some formatters might format disks in a format incompatible with Linux.


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