Is nothing sacred?
As the professionally paranoid, we know all too well that we cannot take anything for granted when deploying a new solution.
However, one list that has long gone un-scrutinized by the typical IT professional is the published VMware Hardware Compatibility List. A fellow friend of mine in the IT space recently underwent the less than pleasant experience of having the beloved HCL fail him – resulting in the worst kind of IT issue: intermittent complete outages of his VMware hosts. He was hung – no vMotion – the only course of action being to reboot the ESXi host and pray the VM’s survive.
With weeks between host outages, the problem was almost impossible to pinpoint. Through detailed troubleshooting eventually the breadcrumbs led to the 10G Qlogic single port converged network adaptor (CNA). You’ll be as surprised as my friend was to find that this particular card is well documented as “supported” on VMware’s HCL.
Yes! Betrayed by the HCL! Making matters worse is the fact that the card is also fully supported by HP in his new DL385 G7 servers, as well as the Cisco Nexus switch into which it was plugged. While Qlogic is a well established player in the HBA/CNA space, their email only support did not live up to the Qlogic reputation. My friend and his entire team spent countless hours working on the issue with minimal to no support from Qlogic.
Backed into a corner they decided to take a chance on Emulex OCe11102-FX converged adapters, another formidable player in the market. Issues did arise again – but not stability issues: CIM functionality issues. Unlike their competition, Emulex stepped up to the plate and served up a home run. They took the time to recreate his issue in their lab and boiled it down to the order of the CIM software.
OneCommand Manager for VMware vCenter was then installed. Once the Emulex CIM was installed prior to the HP CIM, my friend finally achieved sustained stability and solid CIM functionality. Some lessons that were learned or reinforced by this experience:
- Make certain the hardware you are looking to invest in is on the VMware HCL.
- Google the specific hardware for reviews and/or comments on the VMware support forums.
- Research that the hardware vendor you select offers phone AND email support – not just email support.
Photo Credit: gemtek1