[Bug 1167834] [NEW] LVM volume name (hostname derived) can conflict with devices names

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When installing 12.04 server (amd64, but shouldn't matter), and one
selects "Guided - use entire disk and setup LVM", the default logical
volume name uses the hostname. For instance, if I use the hostname
"core", this causes problems: when selecting write changes to disk, the
error appears:

"Unexpected error while creating volume group" 
"Autopartitioning using LVM failed because an error occurred while creating the volume group"
"Check /var/log/syslog ..."

Output from syslog:

Apr 11 09:49:35 partman:   Reading all physical volumes.  This may take a while...
Apr 11 09:49:35 partman-lvm:
Apr 11 09:49:35 partman-lvm: No volume groups found
Apr 11 09:49:35 partman-lvm:
Apr 11 09:50:19 partman-lvm:   Physical volume "/dev/sda5" successfully created
Apr 11 09:50:19 partman-lvm:
Apr 11 09:50:19 partman-lvm: /dev/core: already exists in filesystem
Apr 11 09:50:19 partman-lvm:
Apr 11 09:50:19 partman-lvm:
Apr 11 09:50:19 partman-lvm: New volume group name "core" is invalid
Apr 11 09:50:19 partman-lvm:
Apr 11 09:50:19 partman-lvm:
Apr 11 09:50:19 partman-lvm: Run `vgcreate --help' for more information.

Of course, since /dev/core already exists, it fails.


This breaks installation, but isn't clear to the user why it is happening. It's especially confusing as it is the default
recommended choice during install.

A solution - the volume name selection should append something distinct
to avoid conflicting with the device name, for instance: -vg or -lv.

** Affects: debian-installer (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment
-- 
LVM volume name (hostname derived) can conflict with devices names
https://bugs.launchpad.net/bugs/1167834
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