Wrong drive letter during install of Quantal Alpha 2

[Carla Sella]

I was installing Quantal Alpha 2 from live USB key iso: http://cdimage.ubuntu.com/daily-live/20120709.1/quantal-desktop-amd64.iso I arrived to the point where you see the partitioning of the hard drive and have to decide where to install ubuntu, test case: http://testcases.qa.ubuntu.com/Install/DesktopManual.
The first time I booted, my hard drive was detected as /dev/sda with all it's partitions: /dev/sda1, /dev/sda2 ...
As I made a mistake I decided to not confirm the partion scheme but to click on the back button so I could go back to the initial state and re-do the partitioning selection.
After having done that, my PC got stuck and I had to reboot it by pressing the reboot button.
On on the following boots of my USB live key my hard drive is detected as /dev/sde with all it's partitions: /dev/sde1, /dev/sde2...
I did not go further in the installation as I'm not sure of the consequences.
I'm attaching a screenshot.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: ubiquity 2.11.9
ProcVersionSignature: Ubuntu 3.5.0-3.3-generic 3.5.0-rc5
Uname: Linux 3.5.0-3-generic x86_64
ApportVersion: 2.3-0ubuntu1
Architecture: amd64
CasperVersion: 1.319
Date: Mon Jul 9 20:23:25 2012
InstallCmdLine: noprompt cdrom-detect/try-usb=true file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120709.1)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1022726

[Carla Sella (carla-sella)]

I was trying to reproduce the problem with another USB live key, but instead of a plain USB key I made a persistent USB key.
The strange thing is that the first time I booted with this new USB key and tried to install Ubuntu my hard drive got detected as /dev/sde and the device for the bootloader installation is /dev/sdf.

[Colin Watson (cjwatson)]

Device names aren't intended to be stable.

[Carla Sella (carla-sella)]

Ok, I understand, but what about the bootlaoder why /dev/sdf and not /dev/sde?
I just think that this is a bit disorienting for a "normal" user that has to install linux.
So should I carry on with the installation at this point, using /dev/sdf5 for instance instead of /dev/sda5?

[Jean-Baptiste Lallement (jibel)]

likely same bug than 987418

[Brian Murray (brian-murray)]

Yes, please carry on with the installation so we can determine if this in fact a duplicate of bug 987418. Thanks in advance.

[Carla Sella (carla-sella)]

Yes, this is a duplicate of bug 987418 as I found out in this test: http://iso.qa.ubuntu.com/qatracker/milestones/226/builds/19358/testcases/1302/results when I went on with installation till the end.