[Bug 1679216] Re: local-fs fails to mount cdrom, forcing emergency mode boot

[Dan Streetman]

** Changed in: systemd (Ubuntu)
       Status: New => Won't Fix

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Title:
  local-fs fails to mount cdrom, forcing emergency mode boot

Status in systemd package in Ubuntu:
  Won't Fix

Bug description:
  When I tried to boot my Ubuntu machine this morning, it dropped into
  emergency mode.

  It did the same after rebooting.

  Logs showed

  =====

  Apr 03 08:16:25 mikel-study mount[961]: mount: no medium found on /dev/sr0
  Apr 03 08:16:25 mikel-study systemd[1]: cdrom.mount: Mount process exited, code=exited status=32
  Apr 03 08:16:25 mikel-study systemd[1]: Failed to mount /cdrom.
  -- Subject: Unit cdrom.mount has failed
  ...
  -- Subject: Unit local-fs.target has failed
  ...
  Apr 03 08:16:25 mikel-study systemd[1]: local-fs.target: Job local-fs.target/start failed with result 'dependency'.
  Apr 03 08:16:25 mikel-study systemd[1]: local-fs.target: Triggering OnFailure= dependencies.
  Apr 03 08:16:25 mikel-study systemd[1]: cdrom.mount: Unit entered failed state.
  Apr 03 08:16:25 mikel-study systemd[1]: Reached target Emergency Mode.
  -- Subject: Unit emergency.target has finished start-up

  =====

  Removing these two final entries from /etc/fstab and rebooting solved
  it.

  /dev/dvd /dvd iso9660 ro 0 0
  /dev/cdrom /cdrom iso9660 ro 0 0

  Seems the same as
  https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1455683, but
  that was marked WONTFIX two years ago.  Also not clear why it just
  started happening.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: systemd 229-4ubuntu16
  ProcVersionSignature: Ubuntu 4.4.0-71.92-generic 4.4.49
  Uname: Linux 4.4.0-71-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Mon Apr  3 08:22:08 2017
  InstallationDate: Installed on 2015-10-05 (545 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: System manufacturer System Product Name
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-71-generic root=UUID=991bfd06-93fc-44f2-a592-cb3014d658b5 ro quiet splash
  SourcePackage: systemd
  SystemdDelta:
   [EXTENDED]   /lib/systemd/system/rc-local.service → /lib/systemd/system/rc-local.service.d/debian.conf
   [EXTENDED]   /lib/systemd/system/systemd-timesyncd.service → /lib/systemd/system/systemd-timesyncd.service.d/disable-with-time-daemon.conf
   [EXTENDED]   /etc/systemd/system/display-manager.service → /lib/systemd/system/display-manager.service.d/xdiagnose.conf
   
   3 overridden configuration files found.
  UpgradeStatus: Upgraded to xenial on 2016-05-04 (334 days ago)
  dmi.bios.date: 10/21/2011
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0703
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: P8Z68-V LX
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0703:bd10/21/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP8Z68-VLX:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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