Description of problem:
Clean install rhev-hypervisor7-7.0-20140807.0.iso, and enter into Remote Storage page, enable SCSI DH_ALUA.
Then could see "rdloaddriver=scsi_dh_alua" in grub.cfg
[root@localhost admin]# cat /dev/.initramfs/live/grub2/grub.cfg 

#default saved
set timeout=5
#hiddenmenu
menuentry "RHEV-H 7.0-20140807.0.el7ev" {
set root=(hd0,3)
search --no-floppy --label Root --set root
linux /vmlinuz0 root=live:LABEL=Root ro rootfstype=auto rootflags=ro rd.live.image rd.live.check rd.lvm=0  crashkernel=128M elevator=deadline quiet max_loop=256 rd.luks=0 rd.md=0 rd.dm=0 rdloaddriver=scsi_dh_alua
initrd /initrd0.img
}

But after upgrade rhev-hypervisor7-7.0-20140807.0.iso into itself, login the new
version, check that although shown:
Enable SCSI DH_ALUA                       [X]
in Remote Storage page.

But miss "rdloaddriver=scsi_dh_alua" in grub.cfg
[root@dhcp-66-73-241 admin]# cat /dev/.initramfs/live/grub2/grub.cfg 

#default saved
set timeout=5
#hiddenmenu
menuentry "RHEV-H 7.0-20140807.0.el7ev" {
set root=(hd0,2)
search --no-floppy --label Root --set root
linux /vmlinuz0 root=live:LABEL=Root ro rootfstype=auto rootflags=ro rd.live.image rd.live.check rd.lvm=0  crashkernel=128M elevator=deadline quiet max_loop=256 rd.luks=0 rd.md=0 rd.dm=0
initrd /initrd0.img
}
menuentry "BACKUP RHEV-H 7.0-20140807.0.el7ev" {
set root (hd0,0)
search --no-floppy --label RootBackup --set root
linux /vmlinuz0 root=live:LABEL=RootBackup ro rootfstype=auto rootflags=ro rd.live.image rd.live.check rd.lvm=0  crashkernel=128M elevator=deadline quiet max_loop=256 rd.luks=0 rd.md=0 rd.dm=0
initrd /initrd0.img
}

Version-Release number of selected component (if applicable):
rhev-hypervisor7-7.0-20140807.0.iso
ovirt-node-3.1.0-0.6.20140731git2c8e71f.el7.noarch


How reproducible:
100%

Steps to Reproduce:

Actual results:

Expected results:

Additional info:
Met the same issue for "Set Console Path",Miss "console=/dev/ttyS0,115200n8" in grub.cfg after set console path into "console=/dev/ttyS0,115200n8" and upgrade rhevh7