Drives busy on boot up, force unmount

I have two drives that i have set in fstab that i try to have automount. My windows drive and a storage drive. However, they are mounted but not accessible and I have to do a force umount (umount -l) and remount them before they are accessible. Here is the error when trying to mount. Note, i tried to mount before the unmount just to get an idea of what might be going on.

Mount is denied because the NTFS volume is already exclusively opened.
The volume may be already mounted, or another software may use it which
could be identified for example by the help of the 'fuser' command.
mount: /dev/sdb1 already mounted or /media/Data busy
mount: according to mtab, /dev/sdb1 is already mounted on /media/Data

Here is fstab

/dev/sda1      swap                 swap       defaults         0 0
/dev/sda2      /                    ext4       acl,user_xattr   1 1
/dev/sda3      /home                ext4       acl,user_xattr   1 2
/dev/sdb1      /media/Data	    ext4       defaults         0 0
/dev/sdc2      /media/Windows       ntfs-3g    defaults         0 0

Please let us see exactly

cat /etc/fstab

Because what you posted does not look normal

On 2011-10-18 15:36, monte84 wrote:
>
> I have two drives that i have set in fstab that i try to have automount.
> My windows drive and a storage drive. However, they are mounted but not
> accessible

How “not accessible”? What error msg exactly do you get?

> and I have to do a force umount (umount -l)

The -l does not force umount. It is a lazy umount. What it does is refuse
opening of any file on that filesystem. It waits patiently till all the
opened files or directories are closed (it could take days), and finally,
when there are no more anything in use there, it is umounted.

Which means that, if it is in use it will not umount, and the subsequent
mount will fail as well.


Cheers / Saludos,

Carlos E. R.
(from 11.4 x86_64 “Celadon” at Telcontar)

Sorry im dumb, solved. Didnt think things through.