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

[Brian Murray]

** Tags added: precise

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Title:
  LVM volume name (hostname derived) can conflict with devices names

Status in “debian-installer” package in Ubuntu:
  New

Bug description:
  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.

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