Compaq StorageWorks UltraSCSI RAID Enclosure (DS-BA370 Series) User's Guide (EK-BA370-UG. C02, September 1998)

Environmental Monitoring Unit
3–10 UltraSCSI RAID Enclosure
Note
Default temperature settings for EMU firmware version 1.2
are:
• Sensors 1 and 2 — 47
• Sensor 3 — 37
Installing EMU Firmware Updates
EMU firmware updates are installed by Compaq field service
personnel. Appendix C provides general microcode installation
procedures.
Setting the Temperature Sensors
Three temperature sensors are found in each UltraSCSI RAID
enclosure:
• One mounted on the EMU module.
• Two on the rear of the backplane, placed at the top middle.
The EMU sensor monitors the EMU intake air temperature, while the
two enclosure sensors monitor the backplane exhaust air temperature.
Naturally, the exhaust air temperature is higher than the EMU intake
air temperature during normal operation.
In an expansion enclosure configuration, only master EMU
temperatures are set. The temperature set points for the other
enclosures automatically change to match the master EMU setting.
Users have the option of setting the temperature at which an
individual sensor reports an overtemperature condition. The desired
temperature is entered in degrees Celsius within the range of 0°C
(32°F) through 49°C (120°F). See Table 3–2 for the relationship
between °C and °F.
Table 3–3 and Table 3–4 explains the rules to always follow when
setting temperature set points.