Flashing LEDs Explained for an HP Server’s HDD

This link explains what the different colours mean for LEDs on a Hard Disk Drive (HDD): http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=120&prodSeriesId=4091412&prodTypeId=15351&objectID=c00596191