Drive Protection System; Ecc Fault Prediction And Prefailure Warranty; Thermal Sensor; Dual-State Power Button - HP Xw4550 - Workstation - 2 GB RAM Technical Reference Manual

Drive Protection System

The Drive Protection System (DPS) is a diagnostic tool built into the hard drives that is installed in select
HP workstations. the DPS is designed to help diagnose problems that might result in unwarranted hard
drive replacement.
When HP workstations are built, each installed hard drive is tested using the DPS, and a permanent
record of key information is written onto the drive. Each time the DPS is run, test results are written to
the hard drive. The service provider can use this information to help diagnose conditions that caused
you to run the DPS software.

ECC fault prediction and prefailure warranty

When the workstation encounters an excessive number of error checking and correcting (ECC) memory
errors, the workstation displays a Local Alert message. This message contains detailed information
about the errant memory module, enabling you to take action before you experience non-correctable
memory errors. The Prefailure Warranty for ECC memory modules enables you to replace these
modules, free of charge, before the modules actually fail. ECC memory modules are optional on selected
HP workstations.

Thermal sensor

There are multiple sensors on your workstation:
●
One for the processor
●
One for the system board
●
Some hard drives
The processor thermal sensor monitors the processor core temperature, while the board thermal sensor
monitors the internal temperature of the workstation. These sensors control the speed of the workstation
cooling fans as the processor and internal workstation temperatures increase and decrease.
The cooling system is designed to provide maximum thermal dissipation for a fully configured
workstation, which ensures that the processor and all system components do not exceed safe operating
temperatures. If the maximum force of the cooling fans cannot adequately cool the processor, the
processor clock automatically begins to slow. If the temperature remains above limits even with reduced
processor clock speed, the system eventually shuts down.

Dual-State Power Button

With ACPI enabled, the power button can function either as an on/off switch or as a button. The feature
does not completely turn off power, but instead causes the workstation to enter a low-power standby
state. This allows you to power down without closing applications and to return to the same operational
state without any data loss.
To change the power button configuration:
1. Select Start, and select Control Panel>Power Options.
2. In Power Options Properties, select the Advanced tab.
3. In the Power Button section, select Hibernate. (Hibernate must be enabled in the Hibernate
tab.)
After configuring the power button to function as a button, press the power button to put the system in
a very low power state. Press the button again to bring the system out of the very low power state to full
power status. To completely turn off all power to the system, press and hold the power button for four
seconds.
46 Chapter 3 System management ENWW