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The F10StackUnitTest test continuously monitors the target switch and reveals the current status of the stack units, temperature, and number of fan trays and power supplies in the target switch.

Measurement	Description	Measurement Unit	Interpretation
reboot	Indicates whether this stack unit has been rebooted or not.		If this measure shows 1, it means that the stack unit was rebooted during the last measurement period. By checking the time periods when this metric changes from 0 to 1, an administrator can determine the times when this stack unit was rebooted.
uptime	Indicates the time period that this stack unit has been up since the last time this test ran.	Secs	If the stack unit has not been rebooted during the last measurement period and the agent has been running continuously, this value will be equal to the measurement period. If the stack unit was rebooted during the last measurement period, this value will be less than the measurement period of the test. For example, if the measurement period is 300 secs, and if the stack unit was rebooted 120 secs back, this metric will report a value of 120 seconds. The accuracy of this metric is dependent on the measurement period – the smaller the measurement period, greater the accuracy.
total_uptime	Indicates the total time that this stack unit has been up since its last reboot.		This measure displays the number of years, months, days, hours, minutes and seconds since the last reboot. Administrators may wish to be alerted if a stack unit has been running without a reboot for a very long period. Setting a threshold for this metric allows administrators to determine such conditions.