Ubuntu 11.10. When I plug my external Drive Western Digital MyPassport (500Go NTFS) I named WD. I get the following error:

Unable to mount WD
Error mounting: mount exited with exit code 1: helper failed with:
mount: according to mtab, /dev/sdb1 is already mounted on /media/WD
mount failed

I have no problem with the internal NTFS partitions that auto-mounts on startup (ntfs-config does that).

If I plug the WD before I boot Ubuntu, upon login, it's recognized and I can access without no problem. But if I remove it using (Safely remove) and then replug it, I get the error above.

Here is my fstab:

# /etc/fstab: static file system information.
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>

proc    /proc   proc    nodev,noexec,nosuid 0   0
#Entry for /dev/sda5 :
UUID=24540d0f-5803-493c-ace9-e3b3c0cedb26   /   ext4    errors=remount-ro   0   1
#Entry for /dev/sda3 :
UUID=E4C43F7EC43F51D2   /media/OS   ntfs-3g defaults,locale=en_US.UTF-8 0   0
#Entry for /dev/sda2 :
UUID=6A0070F10070C61B   /media/RECOVERY ntfs-3g defaults,locale=en_US.UTF-8 0   0
#Entry for /dev/sdb1 :
UUID=EA6854D268549F5F   /media/WD   ntfs-3g defaults,nosuid,nodev,locale=en_US.UTF-8    0   0
#Entry for /dev/sda6 :
UUID=ed077c52-c50e-406c-9120-9cb6f86ec204   none    swap    sw  0   0

Here is my mtab

/dev/sda5 / ext4 rw,errors=remount-ro,commit=0 0 0
proc /proc proc rw,noexec,nosuid,nodev 0 0
sysfs /sys sysfs rw,noexec,nosuid,nodev 0 0
fusectl /sys/fs/fuse/connections fusectl rw 0 0
none /sys/kernel/debug debugfs rw 0 0
none /sys/kernel/security securityfs rw 0 0
udev /dev devtmpfs rw,mode=0755 0 0
devpts /dev/pts devpts rw,noexec,nosuid,gid=5,mode=0620 0 0
tmpfs /run tmpfs rw,noexec,nosuid,size=10%,mode=0755 0 0
none /run/lock tmpfs rw,noexec,nosuid,nodev,size=5242880 0 0
none /run/shm tmpfs rw,nosuid,nodev 0 0
/dev/sda3 /media/OS fuseblk rw,nosuid,nodev,allow_other,blksize=4096 0 0
/dev/sda2 /media/RECOVERY fuseblk rw,nosuid,nodev,allow_other,blksize=4096 0 0
/dev/sdb1 /media/WD fuseblk rw,nosuid,nodev,allow_other,blksize=4096 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,noexec,nosuid,nodev 0 0
gvfs-fuse-daemon /home/hanine/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev,user=hanine 0 0

Appearently it cannot be mounted because upon login, it finds that it is already mounted. Some sort of conflict.

Does anyone have a clue on how to solve this. Thanks.