When reinstalling DPM, be sure to retain protected data

When fixing problems in Microsoft Data Protection Manager (DPM) through uninstall/reinstall, be sure to save shadow copies of your data and log files.

Sometimes the only way to deal with a corrupted application in Microsoft Windows is to uninstall and reinstall it. Microsoft' s Data Protection Manager (DPM) is no exception.

However, with DPM, it is critical to safeguard the data, which consists of shadow copies of your data and log files and other information vital to system safety.

DPM provides an option for uninstalling and reinstalling while maintaining the existing data. The process is straightforward, but Microsoft cautions it can only be used to reinstall the same version of DPM with no changes whatsoever! If you use the retain data option and attempt to make changes, such installing a new version of DPM you can corrupt your data and lose information.

Just follow these procedures:

  • Create a backup of the DPM server.
  • Uninstall DPM, selecting the retain data option.
  • Reinstall the same version of DPM.
  • Install all of the DPM updates you had on the previous installation.

Note: This procedure can only exactly restore the same version of DPM at the same location. Trying to make any changes is likely to corrupt data.

Here are a few more caveats:

  • Do not use this method to upgrade to a later version of DPM.
  • Do not remove or change any DPM-related Registry entries.
  • Do not delete or change any users or groups.
  • Do not uninstall SQL or SQL reporting services.
  • Do not delete the DPM databases.
  • Do not perform disk operations on the disks holding the storage pool, including reformatting, deleting or removing drives.

One final note: This procedure does not repair a corrupted database.

About the author: Rick Cook specializes in writing about issues related to storage and storage management.

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