Asus RS700-E6/RS4 - Manual (Page 18)

Chapter 1: Product introduction 1-8
1.7.3 HDD status LED
SATAII/SAS HDD LED Description
HDD Status LED
GREEN ON SATAII/SAS HDD power ON
RED ON SATAII/SAS HDD not present
RED Blinking
1. HDD has failed and should be swapped
immediately (slow blinking, 2 times/sec)
2. RAID rebuilding (fast blinking, 10 times/sec)
HDD Activity LED GREEN Blinking Read/write data from/into the SATAII/SAS HDD
When using ICH10R Intel Matrix Storage RAID, HDD LEDs will not work.
1 2
HDD Status LED
HDD Activity LED