gparted truncates device names for /dev/mapper devices

[Chris Coulson]

Binary package hint: gparted

GParted in Gutsy appears to truncate device names for /dev/mapper devices, omitting the partition number from the end. I've attached a screenshot, showing GParted listing 8 partitions on 1 device, all with apparently identical device names. Note, the ouptut of fdisk -l /dev/mapper/nvidia_effeccbe is:

sudo fdisk -l /dev/mapper/nvidia_effeccbe

Disk /dev/mapper/nvidia_effeccbe: 500.1 GB, 500118585344 bytes
255 heads, 63 sectors/track, 60802 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xffffffff

                      Device Boot Start End Blocks Id System
/dev/mapper/nvidia_effeccbe1 * 1 19581 157284351 7 HPFS/NTFS
/dev/mapper/nvidia_effeccbe2 19582 60672 330063457+ 5 Extended
/dev/mapper/nvidia_effeccbe3 60673 60802 1044225 83 Linux
/dev/mapper/nvidia_effeccbe5 19582 22072 20008926 83 Linux
/dev/mapper/nvidia_effeccbe6 22073 37012 120005518+ 83 Linux
/dev/mapper/nvidia_effeccbe7 37013 37262 2008093+ 83 Linux
/dev/mapper/nvidia_effeccbe8 37263 39753 20008926 83 Linux
/dev/mapper/nvidia_effeccbe9 39754 60672 168031836 83 Linux

...which is what I'd expect to see in GParted

[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

[Chris Coulson (chrisccoulson)]

I just tried this with 0.4.3, and this is actually fixed now

[Curtis Gedak (gedakc)]

Chris, if I recall, Ubuntu added a patch to GParted 0.4.3 to recognize /dev/mapper devices. This solves a portion of the problem of dealing with dmraid devices, but is not the whole solution.

For instance the /dev/mapper device entries would not be deleted when a partition was deleted, nor created when a new partition was created.

The current development version of GParted uses the "dmraid", "kpartx", and "dmsetup" commands to address these and other problems when working with /dev/mapper dmraid devices.

This new GParted software is available for testing at the above posted forum link.