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Description of problem:
The grub miss the backup version after upgrade in legacy(non-uefi) machines.

e.g. 
1. upgrade form rhev-hypervisor6-6.4-20130130.0.0.el6 to itself.
2. upgrade from rhev-hypervisor6-6.3-20121120.0.el6_3 to rhev-hypervisor6-6.4-20130130.0.0.el6

Version-Release number of selected component (if applicable):
rhev-hypervisor6-6.4-20130130.0.0.el6

How reproducible:
100%

Steps to Reproduce:
1. Install rhev-hypervisor6-6.3-20121120.0.el6_3 to legacy machine.
2. Upgrade rhevh to latest version via tui / cmd / rhevm.
3. focus on grub.
  
Actual results:
1. The grub miss the backup version after upgrade in legacy(non-uefi) machines.
2. No such issue in UEFI machine.

Expected results:
Gurb can save the backup version part after upgrade.

Additional info:

Created attachment 691449 [details]
ovirt.log

rhev-hypervisor6-6.5-20131017.0
ovirt-node-3.0.1-4.el6.noarch

Gurb can save the backup version part after upgrade.
Enter the backup version can successful.

So the bug is fixed, change bug status to VERIFIED.

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.

http://rhn.redhat.com/errata/RHBA-2014-0033.html