PREEMPTIVE_OS_BACKUPREAD

Description

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

Resolved by

DBAs

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

PREEMPTIVE and Non-PREEMPTIVE

See more

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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