Intel SR1500 - AXXMINIDIMM DDR-2 RAID Controller Cache Memory, Manual

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5BPeripheral and Hard Drive Sub-System Intel® Server System SR2500AL
Revision – 1.6
Intel order number D31980-009
56
6.5.2.1 Enclosure Management Controller
The backplane utilizes the features of the Vitesse* VSC410 to implement several enclosure
management functions. The chip provides in-band SAF-TE and SES management and utilizes
the four I
2
C interfaces listed below.
1. I2C bus 0 is connected to an EEPROM which stores configuration and FRU data
2. I2C bus 1 is connected to an LM75 temperature sensor
3. I2C bus 2 is connected to an IPMB bus from the server board.
4. I2C bus 3 is connected to the LSISAS1068 SAS controller.
6.5.2.2 Hard Drive Activity and Fault LEDs
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 40. Hard Drive LED Function Definitions
Status LED Definition
GREEN HDD Activity
AMBER HDD Fail
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 41. 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
6.5.2.3 Optional 6
th
Hard Drive
The backplane is capable of supporting a 6
th
hot-swap SAS/SATA hard drive with the addition of
an optionally installed backplane add-in board. The 6
th
drive add-in board assembly consists of
a PCB with power and interface connectors, and a mounting bracket allowing for the add-in card
to slide into a fitted cut out on the existing backplane.