It seems like insufficient info to tell something definitely. For example, are you deleting through Transact-SQL or through Win32API, etc.
The FILESTREAM data is not deleted immediately from file system because SQL Server transaction logging under full and bulk recovery models permit the crash recovery.
Have you deleted with CHECKPOINT
delete from tablename CHECKPOINT
or tried to execute CHECKPOINT statement or use simple recovery model?
Also, IMO,:
- changing of FILESTREAM (re)configuration require restart of SQL Server
- FILESTREAM data is restricted to LOCAL only drives
- FILESTREAM operations depend on hardware, see Paul Randal's white paper
- "deleting or renaming any FILESTREAM files directly through the file system will result in database corruption"
Check Security and Reliability sections of Paul Randal's white paper
Related discussions containing many subreferences:
Update:
Have you checked permissions of FILESTREAM (Windows) share/container vs. account under which SQL Server runs under. It should have local administrator permissions. It is recommended that no other account be granted permissions on the data container
Update2:
From Paul Randal's white paper:
- "The file system access open operations do not wait for any locks. Instead, the open operations fail immediately if they cannot access the data because of transaction isolation. The streaming API calls fail with ERROR_SHARING_VIOLATION if the open operation cannot continue because of isolation violation"
- "Antivirus software ... access to the BLOB data in the affected file will be prevented, and to SQL Server the file will appear to have been deleted."
- "Note that for a table to have one or more FILESTREAM columns, it must also have a column of the uniqueidentifier data type that has the ROWGUIDCOL attribute. This column must not allow null values and must have either a UNIQUE or PRIMARY KEY single-column constraint"
- "anything that can prevent transaction log truncation may also prevent a FILESTREAM file being physically deleted. Some examples are:"
- FILESTREAM data containers cannot be nested
Run
DBCC CHECKDB
Update3:
I cannot coach you online. This is Q&A board. I already had been banned many times for infringing the rules on StackExchange having discussions instead of posting question or answer
Run
DBCC CheckDB (QPS8, repair_rebuild)
DBCC CheckDB (QPS8) WITH No_INFOMSGS, ALL_ERRORMSGS
and put output here.
To check/set NTFS permissions: right-click on folder in Windows --> Properties --> Security
To check/set MSSQLServer: in command line type
SQLServerManager10.msc
navigate to SQL Server Services and double-click corresponding instance of SQL Server
Update 3b:
Probably, you should drop and recreate index or you have further deeper issues and you should restore database from backup or perform database repair permitting loss of data. This is quite separate topic/question.
I do not want to take any responsibility to guide you on it.
FindNextFile is a Windows API call, so what's happening is the backup process is enumerating all the files in the FILESTREAM folder and backing them up. The error message indicates that the operating system cannot read the file system; this indicates, at least to me, that the file/folder structure on disk is corrupt. There would be a different error returned if the file/folder was simply not found. This may mean the I/O subsystem has problems. I would run chkdsk in Windows on that volume.
From the DBCC CHECKDB documentation, it doesn't look like FILESTREAM checks go beyond ensuring there is linkage between the database and the file system. Running chkdsk has the ability to do a low-level check of the disk contents itself, which is probably what's needed in this scenario. It certainly wouldn't hurt to run CHECKDB on the database anyway (read: regularly) either.
Best Answer
You have manually create a file in a FS container. Stop doing so.
A FS container is defined here:
As you see, is nothing but a file system folder. Do not delete or create files in these folder, is simple as that. all interaction must occur via the FILESTREAM API.