ESX/ESXi/vSphere BIOS Release Date to version mapping (via: the birdhouse in my soul: Which ESX version am I running on ?)
Posted by jpluimers on 2012/10/01
It is possible from inside a guest VM to determine the kind of VMware host it runs on by looking at the BIOS information and for instance map the version of VMware Tools to install.
Still need to find out about the 04/15/11 BIOS Release Date, but this should give me a start (vSphere matches ESX/ESXi):
VMware version BIOS Release Date Address (hex) (bytes) ESX 2.5 04/21/2004 0xE8480 97152 ESX 3.0 04/17/2006 0xE7C70 99216 ESX 3.5 01/30/2008 0xE7910 100080 ESX 4 08/15/2008 0xEA6C0 88384 ESX 4U1 09/22/2009 0xEA550 88752 ESX 4.1 10/13/2009 0xEA2E0 89376 ESX 5 01/07/2011 0xE72C0 101696 ESX 5.1 22/06/2012 0xEA0C0 89920
–jeroen
Via:
- the birdhouse in my soul: Which ESX version am I running on ?.
- the birdhouse in my soul: identifying the ESX version in a VM: peeking through the blinds.
- VMware Communities: how to determine the ESX version from….
- Detecting VMware ESX version from the guest OS | Field Commander Wieers.
The Wiert Corner - irregular stream of stuff 
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