Am happy to say I now see disk IO data starting from when I upgraded (actually I think it grabbed the last hour's worth from the ESX hosts).
A few questions
-this data will be dumped into the database for historical reporting, right?
-Obviously the data needs to be interpreted. I know we can look at trends to see of we are getting spikes, increased IO activity once we have some data and establish a baseline, but where can I find a way to correlate this data against real world values - IE. what would be considered good and bad when it comes to monitoring something like DISK WRITE latency? Where should we set alarms - how many milliseconds for warning / error, etc. I know this is VMware knowledge..am wondering if there is any best practice guides out there?