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Description of problem:
Detect whether yaboot is installed on ppc64
and report it as HIGH risk.
If yaboot is installed then upgrade fails currently.

User could create a grub.conf file and store them to specific location
defined by solution text.
Preupgrade script will check whether grub.conf exists on that location
and if it does not exist then it will fail.

How reproducible:
allways on ppc64 and yaboot

Steps to Reproduce:
1.
2.
3.

Actual results:
Upgrade on ppc64 failed in case of yaboot.

Expected results:
Upgrade is successful.

Additional info:

Merged to contents by commit http://git.app.eng.bos.redhat.com/git/preupgrade-assistant-contents.git/commit/?id=d3b3cee727c852133e29be2c8b9b458ee538dd7a

*** Bug 1217373 has been marked as a duplicate of this bug. ***

Bad condition in /root/preupgrade/RHEL6_7/system/yaboot/check.sh:

bad:         if  [ -f '/etc/default/grub' ]; then
have to be:  if ![ -f '/etc/default/grub' ]; then

http://brewweb.devel.redhat.com/brew/taskinfo?taskID=9664614

As terka outlined above, the preupgrade-assistant's recommendation works OK now.

However, it's worth noting that ppc64 is still considered unsupported by KB article as well and by Architecture Support, so upgrade is still not possible to do without `--force`.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-1608.html