Just sharing something that a partner pointed out to me the other day, which I did add it as a potential answer to question in the main forum - but I think it's worth re-iterating and seeking clarification here...
Page 15 of the NetBackup VMware compatibility doc:
http://www.symantec.com/business/support/index?page=content&id=TECH64542
...says that v7.6.0.2 (and v7.6.0.1 with EEB EEB3318872) was built with VDDK 5.5.
The VDDK 5.5 Release Notes:
https://www.vmware.com/support/developer/vddk/vddk-550-releasenotes.html
...doesn't list support for anything below vSphere v5.0U3.
And this is where I make the assumption that VADP is built using VDDK - and so this implies that neither NetBackup v7.6.0.2 nor Appliance v2.6.0.2 will work with vSphere ESX 4.x hosts (and nor NetBackup v7.6.0.1 with EEB3318872 and nor Appliance v2.6.0.1 with EEB3318872). Are both the assumption and the inference correct?
FYI - Re EEB3318872 referenced above, there is more detail (and a workaround) here:
http://www.symantec.com/business/support/index?pag...
FYI - List of VDDK release notes:
VDDK 1.1.1 Release Notes
https://www.vmware.com/support/developer/vddk/VDDK-1.1.1-Relnotes.html
VDDK 1.2 Release Notes
https://www.vmware.com/support/developer/vddk/VDDK-1.2-Relnotes.html
VDDK 5.0 Release Notes
https://www.vmware.com/support/developer/vddk/VDDK-500-ReleaseNotes.html
VDDK 5.1 Release Notes
https://www.vmware.com/support/developer/vddk/VDDK-510-ReleaseNotes.html
VDDK 5.5 Release Notes
https://www.vmware.com/support/developer/vddk/vddk-550-releasenotes.html
