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I've been told about a flash video that demonstrates some of the features included in Citrix XenServer. Some of the features look very handy indeed. But, will it be good enough to give VMware a good run for their money?  Well, unfortunately I am not in a position to comment on that, as I've never touched XenServer before.

Anyway, have a look at the flash video  

**UPDATE NOTICE 9 JUNE 2009**

As this atricle has been posted for over one year, the discount code may have expired by now.

I have found a promotional code that will allow you to get 30% off the cost of a new TechNet plus subscription or 10% off your renewal subscription either online or on DVD.

To take advantege of this offer, goto http://microsoft.com/uk/technetplus and use the promotion code: UKITPRO1

Seriously, 30% discount on TechNet plus, for an IT professional, is good!!!

I had a problem in one of my DRS/HA Clusters where one ESX 3.0.2 host was unable to see an existing VMFS volume although the volume was in use by other ESX hosts in the cluster, and we confirmed that the SAN LUN zoning was done correctly.

I did have the option in the VI client to add more storage, and then select the LUN, but that would reformat the LUN and I would loose all my existing VM's on that volume.

The fix to this issue was to reset the LUN with "Resignaturing"...

When configuring HA on an ESX HA/DRS cluster, the following error occurs:

Error detected on <ESXHOST>.domain.com in cluster <CLUSTERNAME> in <DATACENTER>: hostipaddrsdiffer: cmd failed: ft_gethostbyname and hostname-i return different addresses: <IPADDRESS> and <IPADDRESS>.