2-8 SPARCengine Ultra AX
i
OEM Technical Manual • May 1999
2.1.13 Non-Volatile Memory, Time-of-Day
Field removable module with integral battery, clock circuitry.
Note – Field removal allows removal and retention of module to preserve Host ID,
software license information, MAC address and other information if the
motherboard needs to be replaced.
The TOD/NVRAM may also contain configuration data specific to your installation.
Be sure to keep a copy of this information.
Battery Life 7 years min., 10 years typ.
Time accuracy Approx. 1.5 sec./mo. Can be calibrated for increased
accuracy
User Memory Capacity 8KB usable as OBP NVRAMRC. Used to store OBP
environment variables
Reserved Memory Space 2KB, Non-modifiable by user. Used to store System ID,
EtherNet Address
2.1.14 Advanced System Monitoring
The Advanced System Monitoring (ASM) (formerly referred to as RAS) feature
utilizes dedicated hardware to function. This hardware enables the Firmware and
Software to monitor temperatures and voltages, and monitor and control cooling
fans. Further details can be found in Chapter 3, “Functional Description”.
Caution – You must use the boot -r reconfiguration command each time the
machine is booted to attach the ASM drivers. Otherwise, the system runs without
ASM protection at the Solaris level.
2.1.14.1 Temperature Sensing
Monitoring Points One thermistor is under the CPU module heatsink.
This is used by ASM as the decision point to issue a
warning or to shut down the system. There are also
three thermistors on the Motherboard.
See Mechanical Drawings FIGURE B-9 on page B-7 and
FIGURE B-13 on page B-12
Warning 55°C
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