Assume that you back up a Microsoft SQL Server database that contains a memory-optimized filegroup through VSS based backup. In this scenario, you may notice that the database being backed up remains in frozen I/O state. Additionally, buffer latch time-outs occur for the database(s) with frozen I/O and a mini dump is generated.

Date\Time spid1053    I/O is frozen on database DatabaseName. No user action is required. However, if I/O is not resumed promptly, you could cancel the backup.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


This issue is fixed in the following cumulative updates for SQL Server:

About cumulative updates for SQL Server:

Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:


Learn about the terminology that Microsoft uses to describe software updates.

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