This wait accumulates while SQL Server is waiting for the operating system to read off a backup. This wait type is not documented by Microsoft so not much is known about it. This wait type does not charge as part of regular disk or tape restores. Pre-emptive waits are different from regular (emptive) waits as their execution is controlled by an external processes such as the operating system

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Suggested solutions

  1. Check the SQL Server error log for more information
  2. Check the Windows Event Viewer for any disk related issues

Additional research


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Consider using ApexSQL Monitor, a Windows and SQL Server monitoring tool able to track SQL Server wait types, including the individual query wait statistics

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