[Bug 1479213] Comment bridged from LTC Bugzilla

[bugproxy]

------- Comment From mauricfo at br.ibm.com 2015-08-26 14:34 EDT-------
Canonical,

The problem here is the grub-installer script expects SCSI disks w/ only one letter (/dev/sda), but this scenario has two (/dev/sdaf).
This misclassifies the disk, and the script fails.

Script grub-install, line 327 [1]:
/dev/[hmsv]d[a-z0-9]|...)

It works with this change, at install time:
~ # sed '327 s,|,*|,' -i /usr/bin/grub-installer
So that line is now:
/dev/[hmsv]d[a-z0-9]*|...)

[1] http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/wily/grub-
installer/wily/view/head:/grub-installer#L327

Debugging tip
-------------------

I debugged it by reading the bash traces with this change:
-#set -x
+set +x; exec 2>/g-i.stderr
and noticed this:
+ prefix=/dev/sdaf
+ echo /dev/sdaf2
+ sed s:\(.*\)/.*:\1/disc:
+ disc_offered_devfs=/dev/disc
+ mapdevfs /dev/disc
+ disc_offered=

Verification
---------------

Differences in syslog:
Before:
<...> grub-installer: info: architecture: ppc64el/chrp_ibm
<...> grub-installer: info: Mounting /proc into /target
<...> in-target: <...>
<...> main-menu[295]: WARNING **: Configuring 'grub-installer' failed with error code 1
<...> main-menu[295]: WARNING **: Menu item 'grub-installer' failed.
After:
<...> grub-installer: info: architecture: ppc64el/chrp_ibm
<...> grub-installer: info: Mounting /proc into /target
<...> in-target: <...>
<...> grub-installer: info: Identified partition label for /dev/sdaf2: gpt
<...>
<...> grub-installer: info: grub-install ran successfully

------- Comment From mauricfo at br.ibm.com 2015-08-26 14:38 EDT-------
Typo here (set -x/+x)
+set +x; exec 2>/g-i.stderr
+set -x; exec 2>/g-i.stderr

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https://bugs.launchpad.net/bugs/1479213

Title:
  ISST-SAN: fsp-chip: Alpine: LE-UBUNTU 15.10: LPAR chip01 unable to
  install base OS due to inability to install the GRUB boot loader on
  hard disk

Status in grub-installer package in Ubuntu:
  New

Bug description:
  == Comment: #0 - RODOLFO LOPEZ <lopezro at us.ibm.com> - 2015-07-27 12:55:29 ==
  ---Problem Description---
  PROBLEM DESCRIPTION
  ------------------------------------
  I start the installation of the base operating system in UBUNTU 15.10
  and at the end of the install I get the below pop-up message:

  lqqqqqqqu [!!] Install the GRUB boot loader on a hard disk tqqqqqqqqk
       x                                                                   x
       x                     Installation step failed                      x
       x An installation step failed. You can try to run the failing item  x
       x again from the menu, or skip it and choose something else. The    x
       x failing step is: Install the GRUB boot loader on a hard disk      x
       x                                                                   x
       x                            <Continue>                             x
       x                                                                   x
       mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj

  
  <Tab> moves; <Space> selects; <Enter> activates buttons
   
  Contact Information = Pablo Marquez, pablom at us.ibm.com 
   
  ---uname output---
  do not have that information available for the moment.
   
  Machine Type = 8408-E8E 
   
  ---boot type---
  Network boot
   
  ---bootloader---
  grub
   
  ---Kernel cmdline used to launch install---
  SMS
   
  ---Bootloader protocol---
  tftp
   
  ---Install repository type---
  install image is in kte.isst.aus.stglabs.ibm.com
   
  ---Point of failure---
  Other failure during installation (stage 1)

  == Comment: #2 - SANDHYA VENUGOPALA <vsandhya at in.ibm.com> - 2015-07-29
  01:39:49 ==

  We require patches to partman-multipath, parman-base and grub-
  installer packages for Ubuntu 15.10 version to address this
  installation problem.

  These packages have already been updated to Ubuntu Trusty and Ubuntu Vivid. 
  LP bug - https://bugs.launchpad.net/ubuntu/+source/debian-installer/+bug/1430074

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