A Tale from the Trench – E1000/VMXnet3

powercli

A silent killer

Was it a disaster situation? A 0-day? or a data center fire? Nope, not a flashy problem or even a spectacular firestorm.

It was a simple change

An inadvertent change of a Microsoft Server 2012 R2 VMware template’s NIC from VMXNET3 to E1000. Effectively reducing the NIC bandwidth from 10Gb to 1Gb as well as other benefits of using the VMXNET3 driver over the emulated driver of the E10oo. This went unnoticed and affected ~50 VM’s. Continue reading “A Tale from the Trench – E1000/VMXnet3”

VMware PowerCLI Identifing, Unmounting CDs, and Rescanning the HBAs

These VMware PowerCLI commands came in handy a month or so ago and I’d thought I’d share. Credit is given in the links below.

Hopefully that’s how attribution is given. Hmm better research that. 😉

What do you do when you see a mounted ISO not being used? Left abandoned like a discarded cigarette in a urinal? Does it drive you absolutely mad? Do you go all stabby Joe? Does the OCD kick in and you need to find and unmount the entire world. Then the below may help.

Thanks,

Scott Bollinger / kfalconspb / www.bollingerusa.com

Continue reading “VMware PowerCLI Identifing, Unmounting CDs, and Rescanning the HBAs”