In my view, auto-mounting is inherently more complex than has been
addressed, and the current handling is flawed, more so in Karmic
compared to previous versions (or to Fedora 11, which also uses
DeviceKit).

Due to the challenges, this comment is longish.  To avoid burying an
important point, I'll state it up front, rather than at the end.

*****
As challenging as the auto-mounting problem is, one policy would be really 
useful, and would allow us to separate out the complex cases from the common 
one.  But how would you express and implement a policy that if there is a 
SINGLE partition, auto-mount IT; if there are MULTIPLE partitions, auto-mount 
NONE?
*****

As for auto-mounting issues, David Zeuthen explained elsewhere that
"Nautilus doesn't treat non-removable different from removable when it
comes to mounting file systems. [If] there's a mountable filesystem on a
device, it is mounted. If you don't like automounting, turn it off in
Nautilus."

ON or OFF is a pretty coarse-grained situation.  :-)  Users may start up
with internal drives and external drives, or not, at any given instance,
and want different policies.  OK, so let's use /etc/fstab?  How do you
describe an entry in /etc/fstab to ignore a partition without having to
describe details about it, such as UUID and file system that could
change?.

Let's make it even more fun.    David explained the behavior that I have
seen related to differential treatment of the same drive depending on
whether it is attached via eSATA or USB, "authorization is different
depending on whether the device is considered system-internal or not."
So for the SAME partition, we now have different interpretations for
auto-mounting, depending on connector, despite the fact that it is
removable and hot-pluggable in all cases.

Now lets consider scenarios from my own systems:

  A) An internal drive has multiple distro partitions and shared
partitions.  I only want the partitions I explicitly state that I want
mounted.  Karmic now tries to mount everything if auto-mounting is not
turned off, which means turned off for everything.  I should NOT have to
edit /etc/fstab to exclude partitions, but since we now do, that should
have been addressed as part of the install process, and a GUI provided
to the end user.

  B) I attach USB, eSATA, or docked drives that have MULTIPLE
partitions, and I do NOT want them automounted when connected.  As
before, Karmic attempts to mount them all, with or without authorization
depending upon connector type.  And, as noted in Bug 412449, when I
click to unmount one, Karmic removes the entire device (again, depending
on connector type).  Hopefully, upstream will implement the proposals to
separate drive and volume in the GUI.

  C) I attach various SDHC and USB drives with single partitions.  I do
want the partition mounted upon connect, *BUT* I may also want to
specify mount options, such as the "noatime" option in the /etc/fstab
example below.  Are you proposing that I have an entry in fstab for
every jump drive?    David made a suggestion about using /etc/fstab with
/dev/disk/by-path, but I tried that and observed that given:

   /dev/disk/by-path/pci-0000:15:00.2-part1 /media/SDHC auto
defaults,noauto,user,noatime 0 0

Attempting to solve the problem that way creates the following issues:

   1. The mount point (e.g., /media/SDHC) must be specified, rather than vary 
by partition label
   2. It does not support multiple partitions
   3. Without that entry, NTFS formatted media works; with it, NTFS formatted 
media will not mount via nautilus

To match media attributes against /etc/fstab requires some seriously
whacky udev ju-ju beyond the abilities of most users, and seems highly
impractical compared to what would could do with HAL.  So far I have not
found out how DeviceKit-disks wants to manage it.  I'm not even sure
that DeviceKit wants to handle it, which means that we are losing that
aspect of HAL, and need some sort of meta-data policy system to replace
it.  udev could do it if we had a means by which udev could tell
DeviceKit what attributes to hold on to and use for a device.  But then
we get to explain udev to hoi paloi.

-- 
inconsistent automounting on startup
https://bugs.launchpad.net/bugs/396448
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