Re: remount removeable drive in Lenny - how?

On 2009-07-20_17:13:36, Tiago Saboga wrote:

Paul E Condon:
But, for hal-mounted devices, the umount also deletes the
mount-point.
Andrei Popescu:
The problem seems to be with the volume manager as this does not
happen under Xfce. Maybe the volume manager of your DE also triggers
an "eject" (or something similar)?

Probably. I think KDE even says, for usb sticks, that it "could not
eject the device". But would this make udev/hal remove the device file
along with the mount-point?


I think that the device file is NOT removed. This is what I
observe. When I umount /dev/sdxn, the mount-point /media/MMMPPP is
removed, and the device file is remains. This is GOOD because the
reason for umount is so that I can run e2fsck. So, from observation, a
supposition held by some is false.

Having run e2fsck, I now want to mount the filesystem again. But at
this time, I have no mount point available, and making one manually
screws up subsequent hot-plugging.

I now have three suggestions for programs that are claimed to re-do
the hot-plug activity without actually unplugging and re-plugging the
physical connector. In my testing 'blockdev --rereadpt <device>' and
'partprobe' both work. 'partprobe' is ever-so-slightly more
convenient because it does not require that the <device> be
given. (and wide cards don't work in blockdev because it barfs on a
device that that is already mounted).

In my testing 'udevadm trigger && udevadm settle' seems to be
equivalent to 'sleep 2'. The man page seems to indicate that it should
do something useful, but, for me, its a YMMV-type situation.

I am using Gnome. The fact that behavior is noticably different in
Xfce is interesting and, to me, indicates that the behavior is not
determined by fixed nature of a single module. I think I should look
into switching from Gnome.

This has been interesting and educational.

Thanks for all the input.

--
Paul E Condon
pecondon@xxxxxxxxxxxxxxxx


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