I have an Adaptec 2405 installed on ESXi 5.0. When the card is idle, it flashes the red LEDs back and forth, Knight Rider -style, just like this video. Is this normal, or is this a fault? I have dug everywhere through the manuals and can't seem to figure it out.
If it is in a fault state, I can't get it to tell me anywhere that is the case.
Whether our engineers were inspired by Cylons or KITT when they designed it I do not know, but I can tell you that this is normal behavior for our cards when there is no I/O.
I have no idea if my reply is correct (I don't have Adaptec 2405), but a little bit of Googling revealed you are not alone with your wondering.
Apparently that K.I.T.T. behaviour (or, "sweeping pattern" as described by some others) is normal and you can possibly disable that LED animation from the Adaptec BIOS settings. I, for one, would not disable that kind of awesomeness.