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Understand the relationship between devices and drivers Use Device Manager to analyze detected devices Use Device Manager to install a device
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Estimated lesson time: 20 minutes
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Devices and Drivers
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The easiest way to think about devices and their associated drivers is to divide the devices into two logical categories: plug and play and non plug and play (downlevel) devices. PnP devices are significantly easier to install, configure, support, manage, and troubleshoot. It is recommended to replace downlevel devices with PnP devices where possible. Downlevel devices are not discussed in this lesson. Most devices manufactured since 1997 are PnP devices, and drivers for many PnP devices are included on the Windows Server 2003 installation CD, which is copied to the %windir%\Driver Cache folder during setup. Service Packs often deliver updated drivers, which are cached in the same folder. Vendor-provided drivers are typically copied to the system during a device s software setup. When Windows Server 2003 detects a new PnP device, and if it finds a driver for that device, it automatically installs the driver and allocates resources to the device, including interrupt requests (IRQs) and direct memory access (DMA). It then lists the device in Device Manager. Device detection occurs when you start a system, when you select Scan For Hardware Changes in Device Manager, or when you run the Add Hardware Wizard. If Windows Server 2003 does not find the driver, you will be prompted to provide the vendor-supplied drivers when the server detects the new device. If you cancel the server s request for the driver, Device Manager will signify the existence of a nonconfigured device with a yellow warning icon. This icon, as shown in Figure 10-1, is also used if there are duplicate devices on the system or if there are conflicts between the resource demands of drivers, which is extremely rare for newer computer systems and PnP devices.
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Managing Hardware Devices and Drivers
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Figure 10-1
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Device Manager warning icon
If Windows Server 2003 cannot recognize a device, Device Manager lists it as an unknown device or, often in the case of universal serial bus (USB) or IEEE 1394 devices, a composite device in the Other Devices folder. A yellow question mark icon indicates that the device is unknown or does not have a driver configured. For a nonconfigured or nonidentified device, you must install the appropriate driver manually for the device to function properly.
Using Device Manager
Device Manager is a Microsoft Management Console (MMC) snap-in and is a component of the Computer Management console. You can also open Device Manager through the System program in Control Panel. Click the Hardware tab, and then click Device Manager. You can change the view, which shows devices grouped by category by default, using the MMC s View menu. Device Manager enables you to update drivers and modify device configuration settings. Table 10-1 describes the tasks for which you can use Device Manager.
Table 10-1
Device Manager Tasks
Usage
Task
Determine whether the Properly configured devices are listed by category. Detected hardware on your computer devices that are not configurable, either because of a lack of an is working properly appropriate driver or an irresolvable resource conflict, are indicated by a yellow icon with an exclamation point. Devices that Windows Server 2003 cannot identify are indicated by a yellow question mark icon in the Other Devices category. Print a summary of the devices that are installed on your computer Change hardware configuration settings Select any device in the MMC details pane. Open the Action menu and then select Print. Print options include System Summary, Selected Class or Device, and All Devices And System Summary. Right-click a device and choose Properties, or double-click a device, to access the device s Properties dialog box.
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