Problems upgrading to 2.2.2 due to software raid10 implementation

I am seeing some very unusual behaviour on x86_64 oraclevm_server 2.2.1. Of the 20 servers running 2.2.1 (all upgraded from the previous 2.1.5), suddenly 4 are experiencing
odd issues such as reboot of the hypervisor and/or reboots of vm's. It is not just a reboot, though. It is as if somebody yanked the power as the hypervisor reports 'crash' when running the 'last' command on it.
When it first occurred, I suspected power supply problems....promptly replaced to no avail. Then it started happening to other hypervisors.
Hardware:
AMD Phenom 3.X MHz - 6core procs
16GB RAM
4 - 500GB drives in raid10 config (software raid)
So in my attempt to find the solution to the problem, I assumed I should minimially upgrade to the latest 2.2.X version in hopes that kernel bugs or any other bug associated
could have been fixed and the problem goes away.
HOWEVER, not only am I not able to figure out what is causing the sudden reboots, I am also unable to upgrade my hypervisors because software raid10 is unsupported in the
install/upgrade CD's.
So before I continue looking for the cause/solution to this problem, I feel it would be prudent to upgrade and see if that fixes the issue.
Does anybody have any advice regarding a way to perform the upgrade to oraclevm server 2.2.2. from 2.2.1 taking into consideration that my /ovs partition is a
software raid10 array built via mdadm.
Pertinent Info:
guest o/s is centos5.7 (install was done as rhel 5 64 bit). Initially was Centos5.5 but have been updated to Centos5.7
it has been my understanding that paravirtualization was reserved for windows. However, I have since read that even linux hosts should run paravirtualized
drivers (still fully virtualized) to aid in performance of block device I/O and network interface throughput.
having read alot of confusing contradicting options on how to install / whether or not to install, I have come to the conclusion that redhat/centos guests should
be running the paravirtualized drivers if they are supported.
Thanks in advance.

Avi Miller wrote:
user3343873 wrote:
Does anybody have any advice regarding a way to perform the upgrade to oraclevm server 2.2.2. from 2.2.1 taking into consideration that my /ovs partition is a
software raid10 array built via mdadm.Do a yum upgrade from 2.2.1 to 2.2.2. The ISO media's Server/ directory is also a yum repository. Just put it on a web server somewhere and create a yum .repo file on your Oracle VM Server to point to it. Or, mount the ISO and create a .repo pointing to the mounted media.
Thanks so much for the quick and useful reply!
That is 100% useful and EXACTLY what I needed to get through this portion. For that alone you get the kudos for the correct answer.
it has been my understanding that paravirtualization was reserved for windows. However, I have since read that even linux hosts should run paravirtualized
drivers (still fully virtualized) to aid in performance of block device I/O and network interface throughput.Actually, Windows cannot run paravirtualized -- just use the enhanced block/net drivers. Linux can run completely paravirtualized, which is the preferred option. On RHEL5/CentOS5 guests, this means installing in full paravirtualized mode, using the "xen" kernel variant. You could also use the Oracle Linux 5 PVM templates as a starting point, which are much simpler to deploy.There appears to be a bit of confusion with this regard as i've seen some contradicting information on it. So just to be sure I fully understand the situation, let me try to
explain myself and thanks again for taking the time to clarify. Also, it could perhaps be the fact that when you install, you have a choice of 'Paravirtualized' or 'Fully Virtualized'
and the terms are being comingled. For instance, there is no 'full paravirtualized' mode as you suggest to use. Is it safe to assume you mean 'Fully Virtualized'? I believe
this is the case as i've read it from the Admin or User's manual which states to install fully virtualized and suggests you change the net to paravirtualized via the manager.
And if so, the stock centos5.4 and greater contained the modules built in to the kernel. Again, if that is the case, then all that is needed is to:
alias the modules in /etc/modprobe.conf,
append the hd[a-d]=noprobe lines to the kernel line in /boot/grub/grub.conf,
remake the initrd
Configure guest network to use 'Paravirtualized' which changes the device type from ioemu to netfront which essentially modifies the vm.cfg as follows
vif = ['bridge=xenbr0,mac=00:16:3E:71:01:AE,type=netfront']
rather than
vif = ['type=ioemu, mac=00:16:3E:71:01:AE, bridge=xenbr0']
when I do that, I reboot and I now show the xen_vbd kernel module being used however the xen_vnif is still not used:
lsmod | egrep 'Used|xen'
Module Size Used by
xen_vnif 59457 0 [permanent]
xen_balloon 45641 1 xen_vnif,[permanent]
xen_vbd 50345 3
xen_platform_pci 117229 3 xen_vnif,xen_balloon,xen_vbd,[permanent]
is it safe to assume block is fine but net is not based on this output?
Thanks again for the help. If there is a resource I should be looking at to avoid asking these questions here in this forum, please
do point me at it and I will be more than happy to dive in there as well.
Thanks again!

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