Problem accessing USB drive from Live USB

[SF007]

Binary package hint: nautilus

I created a Live USB with "USB Startup disk creator", booted from it, and when I try to access the USB flash drive (the Live USB) I get an error:

Unable to mount location: can't mount file

The only work-around is to go to this location:
/cdrom
and now I can access the files on the Flash drive (but only in read-only mode)

Note 1 : This is not a problem nor on Thunar nor on dolphin (but the files are also read-only in both)
Note 2: Using cd2usb (windows tool) to create the Live USB produces the same result
Note 3: Using root mode allows to write to the USB drive (on all file-managers)
Notes 4: The USB drive does not appear on:
/media

[[e-mail] (j.scott.gwin)]

Thank you for reporting this issue, it helps make Ubuntu better. Confirmed.

[Sebastien Bacher (seb128)]

can you mount the key using gvfs-mount?

[SF007 (sf007)]

Hey Sebastien, how I'm am supposed to do that?
-What command to run, parameters, etc... ? assuming my pendrive is: /dev/sdb

[Sebastien Bacher (seb128)]

gnome-mount -v -b -d <device>

[SF007 (sf007)]

Just tried:
gnome-mount -v -b -d /dev/sdb

And I got:

Message: Drive /dev/sdb does not contain media.
Unable to mount media.
There is probably no media in the drive.

[Sebastien Bacher (seb128)]

could you run "dmesg | grep sdb"?

[SF007 (sf007)]

Output of "dmesg | grep sdb":

[ 8.939548] sd 6:0:0:0: [sdb] 7928832 512-byte hardware sectors: (4.05 GB/3.78 GiB)
[ 8.940689] sd 6:0:0:0: [sdb] Write Protect is off
[ 8.940694] sd 6:0:0:0: [sdb] Mode Sense: 43 00 00 00
[ 8.940699] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 8.943450] sd 6:0:0:0: [sdb] 7928832 512-byte hardware sectors: (4.05 GB/3.78 GiB)
[ 8.944560] sd 6:0:0:0: [sdb] Write Protect is off
[ 8.944565] sd 6:0:0:0: [sdb] Mode Sense: 43 00 00 00
[ 8.944570] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[ 8.944576] sdb: sdb1
[ 8.947041] sd 6:0:0:0: [sdb] Attached SCSI removable disk

[Sebastien Bacher (seb128)]

what about "gnome-mount -v -b -d /dev/sdb1"?

[MrGuga (mrguga)]

ubuntu@ubuntu:~$ gnome-mount -v -b -d /dev/sdb1
gnome-mount 0.8
** (gnome-mount:7037): DEBUG: Mounting /org/freedesktop/Hal/devices/volume_uuid_5269_3854
** (gnome-mount:7037): DEBUG: read default option 'shortname=mixed' from gconf strlist key /system/storage/default_options/vfat/mount_options
** (gnome-mount:7037): DEBUG: read default option 'uid=' from gconf strlist key /system/storage/default_options/vfat/mount_options
** (gnome-mount:7037): DEBUG: read default option 'utf8' from gconf strlist key /system/storage/default_options/vfat/mount_options
** (gnome-mount:7037): DEBUG: read default option 'umask=077' from gconf strlist key /system/storage/default_options/vfat/mount_options
** (gnome-mount:7037): DEBUG: read default option 'exec' from gconf strlist key /system/storage/default_options/vfat/mount_options
** (gnome-mount:7037): DEBUG: read default option 'flush' from gconf strlist key /system/storage/default_options/vfat/mount_options
** (gnome-mount:7037): DEBUG: Mounting /org/freedesktop/Hal/devices/volume_uuid_5269_3854 with mount_point='', fstype='', num_options=6
** (gnome-mount:7037): DEBUG: option='shortname=mixed'
** (gnome-mount:7037): DEBUG: option='uid=999'
** (gnome-mount:7037): DEBUG: option='utf8'
** (gnome-mount:7037): DEBUG: option='umask=077'
** (gnome-mount:7037): DEBUG: option='exec'
** (gnome-mount:7037): DEBUG: option='flush'
** Message: Mount failed for /org/freedesktop/Hal/devices/volume_uuid_5269_3854
org.freedesktop.Hal.Device.Volume.AlreadyMounted : Device /dev/sdb1 is already mounted.

i also tried umounting (obvious it wouldn't work)
ubuntu@ubuntu:~$ gnome-umount -v -b -d /dev/sdb1
gnome-mount 0.8
** (gnome-umount:7039): DEBUG: Unmounting /org/freedesktop/Hal/devices/volume_uuid_5269_3854
** (gnome-umount:7039): DEBUG: Setting up 750ms timer for Flushing Cache dialog
** (gnome-umount:7039): DEBUG: in unmount_done : user_data = 0x0
** Message: Unmount failed for /org/freedesktop/Hal/devices/volume_uuid_5269_3854: org.freedesktop.Hal.Device.Volume.UnknownFailure : Cannot open /media/.hal-mtab

still read only to user:
ubuntu@ubuntu:~$ mkdir /cdrom/test
mkdir: não é possível criar o diretório `/cdrom/test': Permissão negada

also obvious, but i am not allowed to chmod -R 766 /cdrom

[Pedro Villavicencio (pedro)]

do you still get this issue with karmic?

[Pedro Villavicencio (pedro)]

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to New. Thanks again!.