Maintenance of nShield Hardware

This chapter describes maintenance steps for your nShield hardware installation.

After installing your nShield HSM by following the Installation Guide, Entrust recommend that you use some of the provided software utilities to monitor your installation. Specifically, the stattree command allows reporting of voltages and temperatures from your module.

For more information regarding stattree, see stattree: information utility.

Temperature Monitoring for Airflow Validation

Temperatures within a module are monitored to protect against potential attacks, and to prevent overheating. The temperature of the internal ambient air of an nShield HSM is reported as CurrentTempC and CurrentTemp2C under the HostEnvStats node tag of stattree.

The table below documents the expected normal operating ranges for the temperatures of your module. Module temperatures would be expected to be within these values when installed with sufficient cooling in an approximately 20-30°C ambient air temperature environment. Calculated stattree statistics such as minima and maxima are reset on module reboot.

The temperatures in this table do not cover operation of the product across the full temperature range specified in the Warnings & Cautions and Installation Guide. This is because these values are recommendations to ensure a long product lifetime, thus are specified for 20-30°C ambient air operation.

stattree Statistic Description Minimum expected in optimum environment Maximum expected in optimum environment

`stattree` Statistic	Description	Minimum expected in optimum environment	Maximum expected in optimum environment
`CurrentTempC`	Internal temperature 1	10°C	45°C
`CurrentTemp2C`	Internal temperature 2	10°C	45°C
`MaxTempC`	Maximum of internal temperature 1	-	45°C
`MaxTemp2C`	Maximum of internal temperature 2	-	45°C

CurrentTempC

Internal temperature 1

10°C

45°C

CurrentTemp2C

Internal temperature 2

10°C

45°C

MaxTempC

Maximum of internal temperature 1

45°C

MaxTemp2C

Maximum of internal temperature 2

45°C

If any of the above temperatures are reporting higher than their specified maximum it is likely your nShield hardware does not have sufficient cooling. Please refer to the Installation Guide to confirm your cooling setup.