HP P9000 Tiered Storage Manager Software 7.4.1-00 CLI Reference Guide (TB585-96029, April 2013)

With the CLI, an output level of 0, 10, 20, or 30 is set based on the content of the log output message,
regardless of whether the type of error message is error, warning, or information. Only messages
whose output level is less than or equal to the value set for this property are output to the trace log.
This property can be set to a value from 0 to 30, but HP recommends the default output level of 20.
Default: 20
CLI Reference Guide 177