Led Indicators; Function Check; Channel Mode; Pci Bus Clock - Intel SRCU32 - RAID Controller User Manual

LED Indicators

There are a number of LED indicators on the RAID controller that indicate the various modes
and/or states of the controller.

Function Check

Indicates the activity on the controller. See Table 7 for detail.

Table 7. Function Check

LED Function
A Indicates activity on SCSI channel A
B Indicates activity on SCSI channel B
T Indicates Bus Master DMA transfers (the brighter the light, the more DMA's)
S When system is powered, indicates that controller is online (i.e. installed correctly)

Channel Mode

A yellow LED for each Ultra160 SCSI channel, indicates the current SCSI mode of the
corresponding channel. If the LED is lit, the Ultra160 SCSI channel is operating in Low Voltage
Differential (LVD) mode. If the LED is not lit, this channel is operating in Single-Ended (SE)
mode.

PCI Bus Clock

Indicates the clock speed of the PCI Bus interface. If the LED is not lit, the bus speed in 33MHz.
If the LED is lit, the bus speed is 66MHz.

Jumpers

In addition to the Termination Jumpers (described earlier in this document), the IIR controller has a
series of jumpers that allow for specific configuration of the controller.
Getting Started 31