[Bug 1347726] Re: ubuntu14.04 installation hang on "The installer has detected that the following disks have mounted partitions"

Mon Jun 29 19:02:59 UTC 2015

This was reported on the forums too:
http://ubuntuforums.org/showthread.php?t=2215103 where directhex2
mentioned:

	I've tracked down the problem to a change in debian-installer-utils 1.98

Looking at the changelog (https://launchpad.net/ubuntu/saucy/+source/debian-installer-utils/+changelog) I see:

	[ Joey Hess ]
 	* fetch-url: Try to mountmedia when getting a file, to support preseed
   	via USB from netboot.

That change adds a call to mountmedia
(http://anonscm.debian.org/cgit/d-i/debian-installer-
utils.git/commit/?id=916a613577c5cd747d15b3d20f16b9518d7d54ea)

That code will list the disk partitions (http://bazaar.launchpad.net
/~ubuntu-
branches/ubuntu/wily/mountmedia/wily/view/head:/mountmedia#L24).

In my case that finds /dev/sda1 (my existing HD boot partition) and mounts that as /media.
My CD is on /dev/sr0 is mounted as /cdrom. I have no other media I need to have mounted.

The forum suggested a workaround: unmount /media in an early preseed command.
You want to ignore failures when you run on a system where /media does not get mounted (blank HD).
This worked for me:

    d-i preseed/early_command string umount /media || true

What is the right fix here? I can't imagine how mountmedia picking a HD
partition on the target disk and mounting it makes a lot of sense in the
overwhelming majority of cases. Should it not be doing that? Should
debian-installer-utils not use mountmedia? Should there be an installer
option to skip it? Are there any better ways to avoid this?

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https://bugs.launchpad.net/bugs/1347726

Title:
  ubuntu14.04 installation hang on "The installer has detected that the
  following disks have mounted  partitions"

Status in debian-installer package in Ubuntu:
  Confirmed

Bug description:
  ---Problem Description---
  ubuntu14.04 installation hang on 
  "

                 [!!] Partition disks                   

       The installer has detected that the following disks have mounted       
       partitions:? /dev/sda                                                               

    Do you want the installer to try to unmount the partitions on these    
        disks before continuing?  If you leave them mounted, you will not be   
    able to create, delete, or resize partitions on these disks, but you  may be able to install to existing partitions there.                   

        Unmount partitions that are in use?                                   
       <Go Back>             <Yes>    <No>    
  "

  ---uname output---
   ~ # uname -a Linux ubucn 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 GNU/Linux

  Machine Type = vm on dx360m4 host 

  ---System Hang---
   The preseed conf is:
  root at ubumn14:~# cat /install/autoinst/ubucn

  ### Localization
  d-i debian-installer/locale string en_US
  d-i localechooser/supported-locales multiselect en_US.UTF-8

  # Keyboard Selection
  d-i console-setup/ask_detect boolean false
  d-i keyboard-configuration/layoutcode string en

  ### Network Configuration

  d-i netcfg/get_hostname string unassigned-hostname
  d-i netcfg/get_domain string unassigned-domain
  d-i netcfg/wireless_wep string
  d-i netcfg/dhcp_timeout string 120
  ### Mirror settings
  # If you select ftp, the mirror/country string does not need to be set.

  d-i mirror/country string manual
  d-i mirror/protocol string http
  d-i mirror/http/directory string /install/ubuntu14.04/x86_64
  d-i mirror/http/proxy string

  # Suite to install.
  #d-i mirror/suite string testing
  # Suite to use for loading installer components (optional).
  #d-i mirror/udeb/suite string testing

  ### Partitioning
  # This creates a small /boot partition, suitable
  # swap, and uses the rest of the space for the root partition:
  d-i partman-auto/method string regular
  d-i partman-lvm/device_remove_lvm boolean true
  d-i partman-md/device_remove_md boolean true
  d-i partman/unmount_active boolean true
  #create the /tmp/partitioning based on the uefi or legacy bios 

  d-i partman/early_command string \
      debconf-set partman-auto/disk ""
  d-i partman-auto/expert_recipe_file string /tmp/partitioning

  # This makes partman automatically partition without confirmation, provided
  # that you told it what to do using one of the methods above.

  d-i partman/confirm_write_new_label boolean true
  d-i partman/choose_partition select finish
  d-i partman/confirm boolean true
  d-i partman/confirm_nooverwrite boolean true

  ### Account setup 

  d-i passwd/root-login boolean true
  d-i passwd/make-user boolean false

  d-i passwd/root-password-crypted password !!!!edited out!!!!

  ### Clock and time zone setup

  d-i clock-setup/ntp boolean true
  d-i clock-setup/ntp-server string 9.114.34.88
  d-i clock-setup/utc boolean true
  d-i time/zone string America/New_York

  ### Apt setup

  d-i apt-setup/multiverse boolean false
  d-i apt-setup/universe boolean false
  d-i apt-setup/backports boolean false
  d-i apt-setup/updates boolean false

  ### Boot loader installation

  d-i grub-installer/only_debian boolean true

  ### Package selection

  tasksel tasksel/first multiselect standard

  # gawk required for the xCAT scripts to work
  # Otherwise it installs mawk, which doesn't work

  d-i pkgsel/include string  openssh-server ntp gawk nfs-common snmpd

  d-i debian-installer/allow_unauthenticated string true
  d-i pkgsel/update-policy select none
  d-i pkgsel/updatedb boolean false

  ### Finishing up the installation
  d-i finish-install/reboot_in_progress note

  ### X configuration
  xserver-xorg xserver-xorg/autodetect_monitor boolean true

  xserver-xorg xserver-xorg/config/monitor/selection-method \
    select medium

  xserver-xorg xserver-xorg/config/monitor/mode-list \
    select 1024x768 @ 60 Hz

  d-i preseed/early_command string wget http://`cat /tmp/xcatserver`/install/autoinst/ubucn.pre; \
       chmod u+x ubucn.pre; \
       ./ubucn.pre 

  d-i preseed/late_command string wget http://`cat /tmp/xcatserver`/install/autoinst/ubucn.post; \
       chmod u+x ubucn.post; \
       cp ./ubucn.post /target/root/post.script; \
       mount -o bind /proc /target/proc -t proc; \
       mount -o bind /dev /target/dev; \
       mount -o bind /dev/pts /target/dev/pts -t devpts; \
       mount -o bind /sys /target/sys; \
       chroot /target /root/post.script

  Install method: Network

  Install disk info: 
  The partition script:
  ubuntu-boot ::
  100 50 100 ext3
      $primary{ } $bootable{ } method{ format } format{ } use_filesystem{ } filesystem{ ext3 } mountpoint{ /boot }
      .
  500 10000 1000000000 ext3
      method{ format } format{ } use_filesystem{ } filesystem{ ext3 } mountpoint{ / }
      .
  2048 512 300% linux-swap
      method{ swap } format{ }
      .

  Install ISO Information: # cat /install/ubuntu14.04/x86_64/.disk/info Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)root at ubumn14

  > Hi Song Yang, 
  > Have you tried using the latest iso build available at 
  > http://cdimage.ubuntu.com/ubuntu-server/trusty/daily/current/ ?
  > Can you please let us know if the iso here fixes the issue ? 
  > 
  > Thanks.

  hi, I just  tried this trusty-server-amd64+mac.iso,  the problem still
  exist.

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