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FYI for anyone else having a similar problem, it's the NIC drivers. Stock Intel IGB drivers in RHEL5/CentOS5 have issues. It appears that installing the latest drivers from Intel's site resolves things. This bug report describes it fairly well.

https://bugs.launchpad.net/ubuntu/+source/xen-3.2/+bug/236268
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> ---------- Forwarded message ----------

> From: J. D. <jdonline@xxxxxxxxx>
> Date: Sun, Oct 19, 2008 at 6:47 PM
> Subject: Re: [Xen-users] CentOS + Xen + Clustering issue
> To: Wendell Dingus <wendell@xxxxxxxxxxxxx>
>
>
>

> I have had a little trouble similar to yours for paravirtual installs. Using the optical drive in any kind of way can cause problems with pv installs. I found it was surprisingly easy to use ftp instead. I ended up dumping my centos 5.2 install media to an iso file using dd. I used yum to install vsftpd and then started it up. Then I mounted the iso file to the /var/ftp (I think it was). I started the install and pointed it to the ip address of dom0 eth0 and was rockin' and rollin'.

Don't forget to shut down ftp when you are done.
>

hth,

J. D.
>
>

> On Fri, Oct 17, 2008 at 5:35 PM, Wendell Dingus <wendell@xxxxxxxxxxxxx> wrote:
>

>
> Any suggestions anyone? This is so frustrating after such ease of getting things working with Xen previously...
>
> First:
> Single machine, CentOS5.2 CD, install, run virt-manager, install another centos vm paravirtualized, straight-forward and easy, click click done.
>
> Next:
> Move up to 2 machines with FC cards, add in a FC SAN storage unit, the same as above but get RHCS and CLVMD working and then try a paravirtualized install with identical options as previously, pointing to the same install media shared from the same location, and it fails this way... ugh!
>
> Oh well, going to keep reading/researching now... Thanks
>
> PS. I tried putting a CentOS DVD in the drive and pointing to it for a fully-virtualized install which completes just fine. Hmm...

>
>
> ----- "Wendell Dingus" <wendell@xxxxxxxxxxxxx> wrote:
> >
> >
> > Not entirely a Xen only question but...
> >
> > I've installed CentOS 5.2 64-bit on a test machine as well as a pair of machines doing DRBD replication between local disk partitions. I've installed and migrated paravirtualized Linux instances and found it *fairly* straight-forward to get all that worked out.
> >
> > Now though, I have 2 servers with Fibre Channel cards and an FC RAID unit. I've installed CentOS and gotten Cluster Suite and CLVM working and am trying to test further. My DOMU Linux VMs are failing initial install. The stand-alone test machine can still install a domu and they're all trying to pull install media from the same source, another server http serving up the centos dvd.
> >
> > I config the VM (have also just tried pointing to a local file avoiding the SAN too), start it, select keyboard and network parameters, it DHCPs an address, then hangs...
> >
> > CTRL-ALT-F3 shows:
> >
> > 04:43:59 INFO       : URL_STAGE_MAIN - url is http://222.222.222.222/install
> > 04:43:59 ERROR   : got to setupCdrom without a CD device
> > 04:43:59 INFO       : transferring http://222.222.222.222/install/images/updates.img to a fd
> > then it tries /install/disc1/images/updates.img then /install/images/product.img and eventually fails... Those files don't exist on the "install media".
> >
> > So something about cluster suite or some other difference is at fault here but we've not been able to locate it so far. Any suggestions?
> >
> > Thanks
> >

>
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