Intel SPSH4 - Server Platform - 0 MB RAM, Технические характеристики продукции

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SCSI Bay Boardset SPSH4 Server System External Product Specification
Revision 1.11 56
6.3.10 Hard Drive Fault LED
The Hot-Swap Controller is responsible for turning the drive fault LEDs on or off according to the
states specified via commands received via SAF-TE and the IMB. The drive fault LEDs are
yellow and indicate the failure status for each drive. The LEDs are physically located on the
LVD/SE SCSI Backplane. For further information on Slot Status to Fault Light State mapping
refer to
SC5000 Hot-swap Controller Interface EPS.
The LEDs are 4-terminal dual-color (yellow and green) physically located on the backplane.
Table 47: Hard Drive Fault LED
Drive HSBP LED Activated LED Designator LED Color
1 1 DS5A1 Yellow
2 2 DS5B1 Yellow
3 3 DS5C1 Yellow
4 4 DS5D1 Yellow
5 5 DS5E1 Yellow
6.3.11 IMB (I
2
C bus)
The I
2
C bus is a system-wide server management bus. It provides a way for various system
components to communicate independently of the standard system interfaces (e.g., PCI bus or
processor/memory bus). The I
2
C bus controller is integrated into the microcontroller.
6.3.12 Fan Support
The LVD/SE SCSI backplane supports up to two tach fans with a digital-output that can be used
by the microcontroller to assess the fans’ operating condition before total failure, which could
result in hardware damage.
Microcontroller program code is responsible for monitoring the fan speed, which is directly
controlled from backplane, and reporting the fan condition via the I
2
C bus. The Hot-swap
Controller is responsible for reporting fan speed. The speed of the fans is sensed by the Hot-
swap Controller and compared against a ‘low speed’ threshold. The Hot-swap Controller issues
a message on the IMB when the fan speed falls below this threshold. When a fan fails, it should
be replaced; the backplane does not detect second fan failure.
6.3.13 Temperature
The DS1624 on the SAF-TE addin card provides a temperature sensor in the center of the SAF-
TE addin card. This is accessed by a private I
2
C bus.
6.3.14 Serial EEPROM
The DS1624 provides 256 bytes of non-volatile storage. This hold the serial number, part
number, FRU inventory information, and miscellaneous application code used by firmware
about the LVD/SE SCSI backplane. This is accessed by a private I
2
C bus.