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2.3.16 System Hardware Monitor
The system hardware monitor supports following features:
Integrated temperature sensor to monitor system temperature
Voltage sense monitoring to detect voltage level (+12 V, -12 V, +5 V, -5 V, +3.3 V)
Fan speed sensors for up to three fans
With a proprietary application, the system hardware monitor logic will check the voltage,
temperature and fan speed all the time. If any failure occurs, the application will prompt warning
message in a real time.
2.3.17 SCSI Subsystem (CH.#1, CH.#2 and JP6)
The onboard SCSI subsystem features the Adaptec AIC-7895, which contains a dual-channel
Ultra Wide SCSI controller and a PCI bus master interface. It provides up to 40 MB/sec
throughput per channel. The motherboard has three SCSI connectors. Channel #1 has a high-
density 68-pin Wide connector as well as a 50-pin Narrow connector, while channel #2 has a
high-density 68-pin Wide connector only.
Use the onboard 68-pin connector for cabling to 16-bit Wide SCSI devices and use the 50-pin
connector for cabling to 8-bit narrow devices. From end to end, a SCSI cable is route, in a daisy
chain fashion, from the last internal SCSI device to each subsequent internal device including the
onboard host controller. The cable can then connect to an optional converter card (External Kit)
installed in an unused I/O slot of the chassis. From the external kit, an external SCSI cable can be
used to connect external SCSI devices.
For proper operation of Ultra / Ultra Wide SCSI devices, the overall length of the SCSI cable
from the last internal device to the last external device should not exceed 3 meters with four Ultra
/ Ultra Wide SCSI devices and 1.5 meters with eight peripherals per channel.
Install or enable terminators on the last physical SCSI device at each end of the SCSI bus (Note
that a SCSI bus can comprise several SCSI cables) and remove or disable terminators on all other
devices on the SCSI bus. The motherboard will set its terminator to proper state automatically.
Make sure you have assigned each device on the SCSI bus, including the onboard SCSI controller,
a unique SCSI ID.
Note: JP6 is a jumper block for enabling/disabling onboard SCSI controller. The default setting,
1-2, enables the onboard SCSI controller. If you want to disable the onboard SCSI controller, put
the jumper cap to pins 2-3.