When attempting to run dbcc checkdb or create a snapshot database you may encounter the following errors when using a UNC location that does not support all sparse file operations.
2010-09-21 17:27:26.47 spid82 Error: 17053, Severity: 16, State: 1.
2010-09-21 17:27:26.47 spid82 SidePageTable::Init() DeviceIoControl() : Operating system error 1(Incorrect function.) encountered.
2010-09-21 17:27:26.47 spid82 Error: 17204, Severity: 16, State: 1.
2010-09-21 17:27:26.47 spid82 FCB::Open failed: Could not open file \\MyServers\smb2\MSSQL10.MSSQLSERVER\MSSQL\DATA\MYDB.mdf:MSSQL_DBCC11 for file number 1. OS error: 1(Incorrect function.).
This error was encountered on a NAS device. Specifically, the SidePageTable initialization is a call to the Windows API DeviceIoControl using FSCTL_QUERY_ALLOCATED_RANGES.
The following is an example of the call used by SQL Server.
retcode = DeviceIoControl (
error = GetLastError ();
If you are encountering this issue contact your hardware manufacture to obtain the proper device and driver updates.
Note: SQL Server 2008 R2 supports databases on SMB 2.0 compliant devices. The SQLIOSim.exe that ships with SQL Server 2008 R2 has been updated to allow testing against a UNC location. Previous versions of SQLIOSim.exe failed with an error when calling the Windows API GetVolumeNameForVolumeMountPoint.
Currently SQLIOSim.exe can test sparse file implementations but does NOT attempt the FSCTL_QUERY_ALLOCATED_RANGES and as such will not expose the issue that could be encountered by dbcc checkdb or snapshot database creations.
Bob Dorr - Principal SQL Server Escalation Engineer