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mtktang wrote:This is our UEK kernel, so check what devices are being referenced in /etc/fstab. If you're using /dev/xvd style devices or UUIDs or LVM, you can just switch the VM guest type to a Xen PVM guest and it'll boot in full paravirtualized mode.
Linux CSDAB501 2.6.32-200.13.1.el5uek #1 SMP Wed Jul 27 21:02:33 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux
The following is the feedback from Oracle Support.
Oracle Support - March 31, 2012 8:34:28 AM GMT+08:00 [ODM Answer]
kernel-uek-2.6.32-100.35.1.el5uek and higher have support for hardware virtualized guest that uses paravirtualized drivers (PVHVM).
So I assume you run kernel kernel-uek-2.6.32-200.13.1.el5uek.x86_64 which support PVHVM driver by default.
1. The document of '8.11 Installing Paravirtualized Drivers' is url below:
 Show kernel you are running now.
If kernel is support PVHVM driver by default, then you can execute the next steps:
 Modify the /etc/modprobe.conf file to include:
alias scsi_hostadapter xenblk
alias eth0 xennet
Shut down the virtual machine.
Edit the virtual machine and change the Domain Type to Xen PVM. See Section 8.9.9, "Editing a Virtual Machine" for information on editing a virtual machine.
 Start the virtual machine. See Section 8.9.1, "Starting a Virtual Machine" for information on starting a virtual machine
2. Generally we recommend you to install PV guest instead of running HVM guest with pv driver.
As PVHVM is a domain Type which is used to run Microsoft Windows guest operating systems with an acceptable performance level.
I am confused both mode of VM - PVM and HVM. Which one is the best choice of virtualized OEL 5.7 running Oracle 11g R2.
Wait for your feedback.