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SUMMARYThe Windows installer provides source resiliency for features that are installed on-demand in the form of a source list. Programs that rely heavily on network resources for on-demand installations are succeptible to source failures if the source location should change for any reason or should they become damaged. MORE INFORMATION
The source list contains the locations the installer searches for installation packages. The entries in this list can be network locations, Uniform Resource Locators (URLs), or a CD-ROM path. If one of these sources does not respond, the installer automatically tries the next source.
HKEY_CURRENT_USER\Software\Microsoft\Installer\Products\Package code number\SourceList Each source list is program specific. The SourceList registry key contains the information required to build a source list for each program. The key resides in the HKEY_CURRENT_USER hive so it follows users that have user-assigned roaming profiles. The LastUsedSource value uses the following three types of sources:
n;1;\\installpoint\Applications\Office\Word\binA "source" is a fully qualified path to a folder, not a fully qualified path to an installer package. Entries in the source list are folder paths. The name of a package is stored seperately as the PackageName value. For all sources in a particular source list that belong to a program, the package name is identical. List of Network SourcesThe installer maintains a list of alternative install points. The installer uses the alternative list if the LastUsedSource install point is not available. The list of network sources is stored in the following registry key:HKEY_CURRENT_USER\Software\Microsoft\Installer\Products\Package code number\SourceList\Net List of Media SourcesThere is usually not more than a single source in the Media Sourcelist because there is usually only one source media. In the case of multi-disk installations, there are multiple entries in the Media SourceList.NOTE: Microsoft programs that are available on CD-ROM and floppy disks have multiple entries in the Media Sourcelist. The Media Sourcelist is in the following registry key: HKEY_CURRENT_USER\Software\Microsoft\Installer\Products\Package code number\SourceList\MediaThe DiskPrompt value is the friendly name that describes all CD-ROMs or other media disks. List of URL SourcesURL sources are handled the same way as media sources. The list of URL sources is stored in the following registry key:HKEY_CURRENT_USER\Software\Microsoft\Installer\Products\Package code number\SourceList\URLWhen you need to install or repair a feature from the source media, the installer performs the following steps:
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Last Reviewed: December 29, 1999 © 2000 Microsoft Corporation. All rights reserved. Terms of Use. |