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How to Change the Recovery Options for a Service
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By default, when a service fails to start, Windows XP Professional records an error in the System log file (see Lesson 2, Using Event Viewer, for more about this), but takes no further action. Services that are dependent on the failed service also fail to start. You can configure certain recovery actions to occur when a service fails to start, though. To set up recovery actions to take place when a service fails, use these steps: 1. In the Services console, right-click the service, and then click Properties. 2. In the Properties dialog box for the service, click the Recovery tab. The Recovery tab (see Figure 18-4) lets you configure an action to take on the first failure, the second failure, and on all subsequent failures. The actions you can configure include the following:
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Take No Action. This is the default choice. Restart The Service. Windows attempts to restart the service if the service does not start. Run A Program. Windows runs a custom program, which you can use to log error details or even send a notification of the failure. When you select this action, the options in the Run Program section of the Recovery tab become available. Type the path for the program and any command-line parameters you want to use, and indicate whether you want Windows to add the fail count (the number of times the service has failed) to the end of the command. Restart The Computer. Windows restarts the computer. This option provides a good last resort for recovery on important services. Often, a service does not start because services on which it is dependent failed. You should use this setting only on server computers. If a client computer automatically restarted, it could disturb the user s work.
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3. Click OK.
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For the exam, remember the actions you can have Windows take should a service fail: Take No Action, Restart The Service, Run A Program, and Restart The Computer. Typically, you should have Windows attempt to restart the service on the first or second failure. You should have Windows attempt to restart the computer only when a service fails that is vital to the computer s role and when restarting will not interfere with the desktop environment.
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Lesson 1
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Working with Services
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Figure 18-4 Use the Recovery tab to specify the action Windows takes when a service fails.
How to Determine Service Dependency
Many services depend on other services, which means that the other services must start successfully for the services that depend on them to start. You can view the service dependency of any service by using the Dependencies tab of the service s Properties dialog box, shown in Figure 18-5.
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Figure 18-5 Use the Dependencies tab to view services that a service depends on and that depend on it.
The top list shows the services on which the current service depends. The bottom list shows the services that depend on the current service. For the IIS Admin service (the example shown in Figure 18-5), the service depends directly on the remote procedure call (RPC) service and the Security Accounts Manager service (which itself depends on the RPC service). The IIS Admin also has its own dependents: the Simple Mail Transfer Protocol (SMTP) and World Wide Web Publishing services.
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18
Using Windows XP Tools
How to Disable and Enable Services by Using the System Configuration Utility
The System Configuration Utility (which you can also use to control other startup parameters) allows you to disable system services individually or several at a time. To disable a service by using the System Configuration Utility, use these steps: 1. Click Start, and then click Run. 2. In the Run dialog box, type msconfig, and then click OK. Windows displays the System Configuration Utility window. The Services tab, shown in Figure 18-6, displays a list of services on the computer along with the current status (Running, Stopped, or Paused) of each service. 3. To disable a service, clear the check box for the service. To enable a service, select the check box for the service. Windows displays the System Configuration dialog box, asking whether you want to restart your computer. 4. Click OK. When prompted, click Restart. When Windows restarts, the changes you have made take effect.
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