Seva, a VMware Technical Account Manager, put together a cool table with the implications of a VirtualCenter crash. This is a follow up to my blog about VirtualCenter getting more important by the minute. I think the most important thing to remember is that the VM’s keep running whatever happens to your VC Server and HA will still work if [...]

I’ve seen this one on the VMTN forum a couple of times. When the Health Status isn’t showing you could do the following to fix it: Restart VirtualCenter service on the VC Server Restart mgmt-vmware service on the hosts that are affected (service mgmt-vmware restart) Restart vmware-vpxa on the hosts that are affected (service vmware-vpxa restart) If the above did [...]

There seems to be a lot of fuss about HA not being reconfigured when Update 2 is installed. The error message that appears: “HA Agent on <hostname> in cluster <clustername> in <datacenter> has an error Incompatible HA Networks: Host has network(s) that don’t exist on cluster members: <ip address>: Cluster has network(s) missing on host: <ip address>: Consider using Advanced [...]

A while back I wrote down all the HA advanced options. With ESX 3.5 Update 2 VMware added a couple extra advanced options, this is the complete list: das.failuredetectiontime – Amount of milliseconds, timeout time for isolation response action(with a default of 15000 milliseconds). das.isolationaddress[x] – IP adres the ESX hosts uses for it’s heartbeat, where [x] = 1‐10. It [...]