First post to this list.  I would appreciate some help on this issue.

As background, I installed CentOS 7 on a Dell server, and then ran the following commands:

Doing that, I was able to successfully install Xen, create a virtual machine with its own HVM setup, logical volume, etc. and boot it just fine.

I then tried to do the same on an IBM x3550 server I’m trying to install with CentOS 7.  The CentOS 7 install went just fine.  I can boot into the standard kernel and have a working machine.  But after running the commands above to install the Xen hypervisor, the machine hangs on boot for a few moments after displaying the lines below and then reboots in a loop over and over and over:

Loading Xen 4.6.0-2.el7 …

Loading Linux 3.18.21-16.el7.x86_64 …

Loading initial ramdisk …

It never gets beyond that.  If I choose the stock kernel (no Xen) from the Grub menu, it will continue to boot into that just fine.

My grub.cfg file has these entries of note:

What I have tried:

1) adding debug into the vmlinuz line

2) disabling ipv6 in that line

3) adding root=UUID=9dc18146-f9b3-41cc-ba9c-7314689abcde to the last line AFTER /initramfs ….

Nothing so far has made any difference.  Obviously the process works, as it works for me just fine on the Dell server.

Underlying this machine is a SATA RAID 1 PCI card with two SSD drives attached in a RAID 1 mirror.  Not that that should matter, but I’m including it for reference. As noted previously, it boots into the stock kernel just fine.

Any help would be appreciated.