I also had this trigger on a host - HP DL120 G7 (Not on the HAL, I know).
DL120 G7:
System ROM J01 02/01/2012
iLO 3 Advanced, 1.70 Jan 09 2014
Drive Backplane Firmware v1.14
vCSA 5.5.0 U1 (5.5.0.10100 Build 1750781)
vSphere 5.5.0 U1 (build 1881737)
Its twin so far has no issue.
The error seems to talk about a Bay/Port that doesn't exist.
A reboot of the affected host also cleared it up for me.
I'll be applying SPP 2014.06 to it in the next day or two, in case it is something with an older firmware version that is causing it.