Fault-Tolerant Cooling System; Critical Component Monitoring And Error Notification - StorageTek L20 Series General Manual

Fault-Tolerant Cooling System

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Fault-Tolerant Cooling System
In addition to the fans contained in each drive module, the libraries provide exhaust fans
for cooling the library electronics. This cooling system continues to function while a
cooling fan is replaced by a service representative.
StorageTek uses only the most reliable fans, which feature ball-bearing construction
designed for a mean time between failures of 360,000 hours.
The library system constantly monitors the electronics module, and the microcode uses
rotation sensing to detect the fan speed to maintain an optimum temperature. If a fan
fails, the microcode displays an error on the operator panel.
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Critical Component Monitoring and Error
Notification
The libraries monitor their own critical components, such as the drives, robot, fan status,
internal library temperature, and power supplies.
9-2 Seventh Edition MT9104