HP Xw4550 HP xw4550 Workstation - Service and Technical Reference Guide - Page 54
Drive Protection System, ECC fault prediction and prefailure warranty, Thermal sensor
UPC - 883585505951
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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