User guide

Compaq Smart Array 431 Controller User Guide
Q. Why do the drive activity lights light up on some drives when my
system is idle?
A. The Smart Array 431 Controller performs several different background
activities on the drives when the controller is otherwise idle. For
example, the Auto Reliability Monitoring task scans fault tolerant
volumes for defects and verifies the consistency of parity data. The
Drive Parameter Tracking task periodically checks the performance of
all drives on the controller, normally on an hourly basis.