Guenter, > Not sure I understand what you mean with 'bazillions of sensors' and > 'sensor per scsi_device'. Can you elaborate ? I see one sensor per > drive, which is what I would expect. Yes, but for storage arrays, hanging off of struct scsi_device means you would get a sensor for each volume you create. Even though you presumably only have one physical "box" to monitor (ignoring for a moment that the drives inside the box may have their own sensors that may or may not be visible to the host). Also, multi-actuator disk drives are shipping. They present themselves to the host as a target with multiple LUNs. Once again you'll probably have one temperature sensor for the physical drive but many virtual disks being presented to the OS. So you'd end up with for instance 4 sensors in hwmon even though there physically only is one. It's a tough call since there may be hardware configurations where distinct per-LUN temperature is valid (some quirky JBODs represent disk drives as different LUNs instead of different targets, for instance). How expensive will it be to have - say - 100 hwmon sensors instantiated for a drive tray? -- Martin K. Petersen Oracle Linux Engineering
