gparted does not like /dev/mapper devices

[Phillip Susi]

It seems that gparted does not like working with /dev/mapper devices. I believe
it has something to do with the fact that after updating the partition table, it
issues an ioctl to ask the kernel to re-read the partition table and fix up the
partition devices, but this operation is not supported on /dev/mapper devices.

The symtoms that I have seen so far include:

1) Attempting to resise a partition ( NTFS in this case ) simply did nothing.
When I clicked apply, it appeared to work for a few seconds, then just stopped
with no error message. No changes were made to the disk.

2) If you attempt to create a new partition and format it, the new partition
gets created, but the format fails because the ioctl fails and the new partition
device does not exist. I had to only add the partition, apply, then run the
dmraid utility to re-read the partition table and create the new partition
device, then refresh gparted and then format.

http://bugs.gnome.org/show_bug.cgi?id=317262: http://bugs.gnome.org/show_bug.cgi?id=317262

[Daniel Holbach (dholbach)]

Thanks for the bug report, I took the issue to upstream:
http://bugs.gnome.org/show_bug.cgi?id=317262

[Phillip Susi (psusi)]

Didn't I read somewhere that gparted is being created as an ubuntu bounty? Then
why was this moved upstream?

The upstream bug also has not been touched since it was created.

[Matt Zimmerman (mdz)]

(In reply to comment #2)
> Didn't I read somewhere that gparted is being created as an ubuntu bounty?

No, gparted was developed independently of Ubuntu.

[plors (plors)]

'rediscovered' this bug. Could you please take a look at the last comments in
the upstream bug?

thnks :)

[Phillip Susi (psusi)]

Done, thanks for the heads up.

[Phillip Susi (psusi)]

Feisty has regressed on this front unfortunately... now it doesn't even show the dmraid devices in the drop down list.

[DAaaMan64 (daaaman64)]

I am just double confirming Phillip's comment. Gparted does not recognize mapper devices at all. That is with dmraid installed and acknowledging software raid.

[Danny Wood (danwood76)]

This issue still exists with the latest gparted as of Hardy Heron Ubuntu 8.04

[Chris Davis (chris-thedavislabs)]

.. and still exists with the latest gparted as of Hardy Heron Ubuntu 8.04.1

[Phillip Susi (psusi)]

This is still an issue in Ubuntu's Intrepid Ibex release; dmraid devices are not listed in the drop down box of gparted.

[crimescene (foschi-e)]

I comfirm, Gparted don't like dmraid.
in the drop down box the device are called "nvidia_geadaajc1" but is "nvidia_geadaajc", i think it's simple to resolve, gparted just add "1" to partition.

[Chris Coulson (chrisccoulson)]

crimescene - I think you have a separate issue (bug #154864)

[Curtis Gedak (gedakc)]

Initial support for /dev/mapper dmraid devices has been developed for GParted.

If you are able to help out with testing, please read the following GParted forum post:
http://gparted-forum.surf4.info/viewtopic.php?id=13264

[Curtis Gedak (gedakc)]

GParted 0.4.4 has been released. It includes support for /dev/mapper dmraid devices.

See http://gparted.sourceforge.net/news.php for more information.

[Martin Mai (mrkanister-deactivatedaccount-deactivatedaccount)]

This should be fixed in Ubuntu 9.10 since it ships gparted 0.4.5 and the bug has been fixed for gparted 0.4.4. Thanks for reporting.