Functional Description
Table 5-42. Multi-activity LED message type
Byte
Description
Value (VAL): This field describes the state of each LED for a particular location. There
are three LEDs that may be supported by the HBA. Each LED has 3 bits of control.
LED values are:
000b - LED shall be off
001b - LED shall be solid on as perceived by human eye
All other values reserved
The LED bit locations are:
Bits 2:0 - Activity LED (may be driven by hardware)
Bits 5:3 - Vendor Specific LED (e.g. locate)
Bits 8:6 - Vendor Specific LED (e.g. fault)
Bits 15:9 - Reserved
3-2
Vendor specific message is:
Bit 3:0 - Vendor Specific Pattern
Bit 15:4 - Reserved
Note: If Activity LED Hardware Driven (ATTR.ALHD) bit is set, host will output the
hardware LED value sampled internally and will ignore software written activity value on
bit [2:0]. Since ICH10 Enclosure Management does not support port multiplier based
LED message, the LED message will be generated independently based on respective
port’s operation activity. Vendor specific LED values Locate (Bits 5:3) and Fault
(Bits 8:6) always are driven by software.
Port Multiplier Information: Specifies slot specific information related to Port
Multiplier.
Bits 3:0 specify the Port Multiplier port number for the slot that requires the status
update. If a Port Multiplier is not attached to the device in the affected slot, the Port
Multiplier port number shall be '0'. Bits 7:4 are reserved. ICH10 does not support LED
messages for devices behind a Port Multiplier. This byte should be 0.
1
0
HBA Information: Specifies slot specific information related to the HBA.
Bits 4:0 - HBA port number for the slot that requires the status update.
Bit 5 - If set to '1', Value is a vendor specific message that applies to the entire
enclosure. If cleared to '0', Value applies to the port specified in bits 4:0.
Bits 7:6 - Reserved
Datasheet
187
INTEL [ INTEL ]
