On various SATA/SAS backplanes, notably the Icy Box/Raidsonic IB555SK, there is a 'HDD fail signal IN' connector and a note that this can be provided by the controller, to make the failure LED flash.
I can't find any controller that supports this, and presume it's directly supported by the controller (or does it need OS support?). Can anyone offer advice? I'm thinking about buying another backplane with the same signal, because it's nice to do things correctly, but there's no point if nothing supports it... (unless something is manually hacked together)

