XenServer Fails to Boot with Boot from SAN Root Disk Multipathing:"Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)"

The XenServer host has recently been updated with a hotfix that updates the kernel. After patching the XenServer host is in a boot loop. During startup there is a message"Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block0,0" followed by a call trace: The initrd file size i...