There is a red light flashing labeled S-FLT. I assume fault. The unit is one of the earlier arrays. 10 bay of 73GB 10,000 rpm seagates. JBOD. It's the S-FLT light between the two SCSI connector cables. It has a S-LINK port to the right of it. Not sure if it's a controller fault or a drive fault.
There is a green light opposite of it that reads S ACT. The green light is NOT lit.
That S-FLT light blinking red indicates that your SAF-TE processor is functioning OK. The flashing light is a normal indication. If the light stays solid red or not flashing, then you have a problem with the SAF-TE processor.