Re: [gentoo-user] How to set udev rule?

["Jesús Guerrero" <i92guboj@terra.es>]

On Sun, August 30, 2009 21:38, Dirk Heinrichs wrote:
> Am Sonntag 30 August 2009 19:29:39 schrieb Alex Schuster:
>
>
>> I have to change the bus from usb to scsi, then it works. But what
>> about unmounting? Is is possible to have it unmounted after I pull the
>> memory stick?
>
> How do want to umount something that's not there anymore? You have to
> umount _before_ you pull it.

You can force the umount using -l (no, it's not documented in the man
page). You can use this to umount a volume *after* it has been physically
removed. And some people use this crap on udev rules to remove the
volume when they unplug the pendrive. Then they wonder why the heck
the file is not where it should be. I guess they never heard of cached
writes.

The correct thing to do is of course to umount it before,
and then unplug it or whatever.

If you truly want to umount after, you should at least do a sync before
removing the device. In any case, if you don't follow the logical
order of the things don't complain if then you find that the files that
should be there are not there when you need them.

If you truly love risk, just use umount -l, but you have to promise not
to cry if the fs breaks or your files are not writen when you sudenly
unplug the device.

-- 
Jesús Guerrero