[Bug 1607742] Re: [Ubuntu 16.04 GA]OS does not boot once installed on FCoE LUN in legacy mode

[Shamim Nauroz]

Please find below the comments of few of your queries:

>From what I understand, the system boots fine if installed under UEFI
mode, and does not boot if installed in BIOS mode.  Is that correct?

>> Yes that's correct. While installing the OS we see no issues.

At what point does it fail to boot?

>>The installation goes on fine with no issues. After the installation
is complete we are asked to reboot and after that it never boots up.

Are you sure that the disk is visible as a boot device from the BIOS?

>>Yes, we are able to see the disk we map.

Please note we are not able to boot to the GRUB in BIOS but in UEFI we
are able to do so.

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https://bugs.launchpad.net/bugs/1607742

Title:
   [Ubuntu 16.04 GA]OS does not boot once installed on FCoE LUN in
  legacy mode

Status in grub-installer package in Ubuntu:
  New
Status in ubiquity package in Ubuntu:
  New

Bug description:
  CONFIGURATION DETAILS         
  Host OS with Support Pack - Ubuntu 16.04
  Guest/VM OS Details       - NA
  System(s) Under Test      - System x3750 M4(Xinyi Lenovo Red Server)
  Adapter(s) Under Test     - Skyhawk
  IPL Name                  - 
  Active Profile ID         - NA
  Network Configuration     - Connected to Nexus Switch
  SAN Configuration         - IBM Storwize V7000 Target
  OneCapture file attached  - 

  FW Used: 11.0.270.15

  BUG REPRODUCTION DETAILS      
  Test Case Instance        - 
  Reproducibility of Bug    - Always
  Last Known Working Build  - NA
  Time to Reproduce Bug     - 5 Minutes
  Steps To Reproduce Bug    - 
  ===============================
  1.Map a multipath FCoE LUN in legacy mode.
  2.Install Ubuntu 16.04 in the LUN with install "disk-detect/multipath/enable=true" option.
  3.Installation goes on fine.
  4.Once the installation is completed the OS does not boot up in legacy.

  Observation:
  ============

  When we install Ubuntu 16.04 in FCoE LUN in UEFI the OS boots up fine.

  Steps followed to install the OS in the systems here :
  1.After selecting the language press F6, and select "Expert mode" and add the
  line "install disk_detect/multipath/enable=true" in install script.

  2.After few steps where we are asked about different languages and countries we
  are asked to choose the Installer components we want to load, in this page
  select "multipath-modules-4.4.0-21-generic-di:DM-Multipath support"

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