[Bug 770480] Re: Multiple filesystems are mounted on same mountpoint

Sun Feb 5 00:44:45 UTC 2012

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: ubiquity (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/770480

Title:
  Multiple filesystems are mounted on same mountpoint

Status in “ubiquity” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: ubiquity

  While installing Natty beta2 from USB flash drive, I was unable to complete the install due to the installer not being able to unmount /dev/sda10:
  Apr 25 11:43:51 ubuntu ubiquity: umount: cannot umount /dev/sda10 -- /dev/sda6 is mounted over it on the same point.
  Apr 25 11:44:06 ubuntu ubiquity: umount: cannot umount /dev/sda10 -- /dev/sda6 is mounted over it on the same point.
  Apr 25 11:44:18 ubuntu ubiquity[4551]: Reverting lockdown the desktop environment.
  Apr 25 11:44:19 ubuntu activate-dmraid: No Serial ATA RAID disks detected
  Apr 25 11:44:19 ubuntu ubiquity: umount: /target: device is busy.
  Apr 25 11:44:19 ubuntu ubiquity:         (In some cases useful info about processes that use
  Apr 25 11:44:19 ubuntu ubiquity:          the device is found by lsof(8) or fuser(1))
  Apr 25 11:44:19 ubuntu ubiquity: 

  It appears that multiple filesystems have been mounted on /target:
  Filesystem            Size  Used Avail Use% Mounted on
  aufs                  869M  163M  662M  20% /
  none                  1.7G  724K  1.7G   1% /dev
  /dev/sdb1             2.0G  1.6G  387M  81% /cdrom
  /dev/loop0            656M  656M     0 100% /rofs
  none                  1.7G  1.4M  1.7G   1% /dev/shm
  tmpfs                 1.7G   68K  1.7G   1% /tmp
  none                  1.7G   96K  1.7G   1% /var/run
  none                  1.7G  4.0K  1.7G   1% /var/lock
  /dev/sda12             11G  2.5G  8.0G  24% /target
  /dev/sda13             11G  2.5G  8.0G  24% /target/home
  /dev/sda10             11G  2.5G  8.0G  24% /target
  /dev/sda11             11G  2.5G  8.0G  24% /target/home
  /dev/sda6              11G  2.5G  8.0G  24% /target

  The partition that is actually mounted on /target is the newly installed partition:
  ubuntu at ubuntu:/$ cat /target/etc/lsb-release 
  DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=11.04
  DISTRIB_CODENAME=natty
  DISTRIB_DESCRIPTION="Ubuntu Natty (development branch)"

  /proc/mounts does not show the extra partitions being mounted:

  ubuntu at ubuntu:/$ cat /proc/mounts 
  rootfs / rootfs rw 0 0
  none /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
  none /proc proc rw,nosuid,nodev,noexec,relatime 0 0
  none /dev devtmpfs rw,relatime,size=1727568k,nr_inodes=431892,mode=755 0 0
  none /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
  fusectl /sys/fs/fuse/connections fusectl rw,relatime 0 0
  /dev/sdb1 /cdrom vfat rw,relatime,fmask=0022,dmask=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro 0 0
  /dev/loop0 /rofs squashfs ro,noatime 0 0
  /dev/loop1 /cow ext3 rw,noatime,errors=continue,barrier=0,data=ordered 0 0
  aufs / aufs rw,noatime,si=8dfd2b3e7eb58761 0 0
  none /sys/kernel/debug debugfs rw,relatime 0 0
  none /sys/kernel/security securityfs rw,relatime 0 0
  none /dev/shm tmpfs rw,nosuid,nodev,relatime 0 0
  tmpfs /tmp tmpfs rw,nosuid,nodev,relatime 0 0
  none /var/run tmpfs rw,nosuid,relatime,mode=755 0 0
  none /var/lock tmpfs rw,nosuid,nodev,noexec,relatime 0 0
  binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,nosuid,nodev,noexec,relatime 0 0
  /dev/sda12 /target ext4 rw,relatime,errors=remount-ro,barrier=1,data=ordered 0 0
  proc /target/proc proc rw,relatime 0 0
  sysfs /target/sys sysfs rw,relatime 0 0
  none /target/dev devtmpfs rw,relatime,size=1727568k,nr_inodes=431892,mode=755 0 0
  gvfs-fuse-daemon /home/ubuntu/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev,relatime,user_id=999,group_id=999 0 0

  ubuntu at ubuntu:/$ cat /etc/mtab
  aufs / aufs rw 0 0
  none /proc proc rw,noexec,nosuid,nodev 0 0
  none /sys sysfs rw,noexec,nosuid,nodev 0 0
  fusectl /sys/fs/fuse/connections fusectl rw 0 0
  none /dev devtmpfs rw,mode=0755 0 0
  none /dev/pts devpts rw,noexec,nosuid,gid=5,mode=0620 0 0
  /dev/sdb1 /cdrom vfat rw,relatime,fmask=0022,dmask=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro 0 0
  /dev/loop0 /rofs squashfs ro,noatime 0 0
  none /sys/kernel/debug debugfs rw 0 0
  none /sys/kernel/security securityfs rw 0 0
  none /dev/shm tmpfs rw,nosuid,nodev 0 0
  tmpfs /tmp tmpfs rw,nosuid,nodev 0 0
  none /var/run tmpfs rw,nosuid,mode=0755 0 0
  none /var/lock tmpfs rw,noexec,nosuid,nodev 0 0
  binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,noexec,nosuid,nodev 0 0
  /dev/sda12 /target ext4 rw,errors=remount-ro 0 0
  /dev/sda13 /target/home ext4 rw 0 0
  /dev/sda10 /target ext4 rw 0 0
  /dev/sda11 /target/home ext4 rw 0 0
  /dev/sda6 /target ext3 rw 0 0
  /dev /target/dev none rw,bind 0 0
  gvfs-fuse-daemon /home/ubuntu/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev,user=ubuntu 0 0

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: ubiquity 2.6.5
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
  Uname: Linux 2.6.38-8-generic x86_64
  Architecture: amd64
  Date: Mon Apr 25 12:38:53 2011
  LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110413)
  ProcEnviron:
   LANGUAGE=en_US:en
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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