Datasheet

Peripheral and Hard Drive Sub-System Intel® Server System SR1550AL

Revision – 1.3

Intel order number D31982-006

6.4.2.2 Hard Drive Activity and Fault LED’s

The backplanes support an activity/fault LED for each of the hard drive connectors. The LED will

illuminate green for activity or amber for a drive fault. The green activity LED is driven by the

SAS/SATA hard disk drive directly. The amber fault LED is driven by the VSC410*

management controller whenever a fault condition is detected. When the drive is used in a

RAID configuration, the RAID controller will have control over the fault LED and it may exhibit

different behavior.

Table 38. Hard Drive LED Function Definitions

STATUS LED DEFINITION

GREEN ON HDD Activity

AMBER ON HDD Fault

The activity LED functionality is controlled directly by the hard drives. This causes the LED to

function differently between SAS and SATA drives. The expected operation is outlined below.

Table 39. Hard Drive Activity LED Functionality

Condition Drive Type Behavior

SAS Ready LED stays on Power on with no drive activity

SATA Ready LED stays off

SAS Ready LED blinks off when processing a command Power on with drive activity

SATA Ready LED blinks on when processing a command

SAS Ready LED stays off Power on and drive spun down

SATA Ready LED stays off

SAS Ready LED blinks* Power on and drive spinning up

SATA Ready LED stays off