On 01/22/11 2:03 PM, Rudi Ahlers wrote: > Hi all, > > Does anyone know how to control a hard drive light from Linux? I'm > building a 24bay Linux File server which will run software RAID and I > need an easy way for the engineers to see which HDD has gone bad. > > Most of our NAS devices has 2 lights on the hard drive cages and they > automatically signal a bad one (reg light, light constant on , etc) > but I can't figure out how todo this from Linux. > i can't answer your actual question, but generally those backplanes have a "SAF-TE" or "SES" chip on them which appears as a seperate SCSI/SAS device, and the system communicates with this to manage drive status includinng indicators. I have no idea how you get this working in Linux, however, but maybe this is sufficient clue to help find your answer