The operating system returned error 59(An unexpected network error occurred.) to SQL Server during a read at offset 0x0000 in file.

Error Message

 Msg 823, Level 24, State 2, Procedure tables, Line 2 [Batch Start Line 2]

The operating system returned error 59(An unexpected network error occurred.) to SQL Server during a read 

at offset 0x00004675548000 in file '\\Server_Name\D2A_DB\MSSQL\Data\HISTORICAL_NDF_1.ndf'.

Additional messages in the SQL Server error log and operating system error log may provide more detail. 

This is a severe system-level error condition that threatens database integrity and must be corrected 

immediately. Complete a full database consistency check (DBCC CHECKDB). This error can be caused by many

factors; for more information, see SQL Server Books Online.

Cause

The Windows Session Timeout is 60 s by default. This timeout is dependent not only on Data Domain response time, 

but also any network latency. 

If there is a slow network or longer than expected Data Domain processing (such as rapid index expansion under 

a heavy backup load), Windows resets the connection causing backup errors.

PS C:\Windows\system32> get-SmbClientConfiguration

Resolution

Increase the Windows Session Timeout to a higher value such as 180 s by running the following command:

PS C:\Windows\system32> Set-SmbClientConfiguration -SessionTimeout 180 -Force