How to fix Error 5552 on Windows Server 2025 / Windows 11

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Troubleshooting Guide: SQL Server Error 5552 — FILESTREAM GUID File Missing or Inaccessible

Why This Error Happens

Error 5552 occurs when the SQL Server Database Engine attempts to access a FILESTREAM data container file identified by a specific GUID, but the file is missing from the filesystem, has been renamed/moved outside of SQL Server’s control, or is inaccessible due to NTFS permission restrictions. This commonly happens after an improper backup restore, manual manipulation of the FILESTREAM data folder, antivirus quarantine actions, or disk corruption affecting the underlying storage volume. It can also surface if the SQL Server service account lost its ACL permissions on the FILESTREAM container directory after a Windows Server 2025 security policy update or a domain/account change.

Step-by-Step Resolution Guide

Step 1: Verify the FILESTREAM Container and File Existence

  • Locate the FILESTREAM data file ID referenced in the error (the hex value 0x%x) using sys.database_files in the affected database.
  • Run: SELECT file_id, name, physical_name FROM sys.database_files WHERE type_desc = 'FILESTREAM';
  • Navigate to the physical path returned and confirm whether the GUID-named file/folder referenced in the error message actually exists under the $FSLOG or filestream data directory.
  • If the file is missing entirely, check Windows Server 2025 Backup history, Volume Shadow Copy (VSS) snapshots, or antivirus quarantine logs for recovery options.

Step 2: Check and Restore NTFS Permissions

  • Right-click the FILESTREAM root folder (e.g., D:\SQLData\FileStreamContainer) → Properties → Security tab.
  • Ensure the SQL Server service account (e.g., NT SERVICE\MSSQLSERVER or your custom domain service account) has Full Control permissions.
  • Run this PowerShell command to reset inheritance and reapply permissions:
  • icacls "D:\SQLData\FileStreamContainer" /grant "NT SERVICE\MSSQLSERVER:(OI)(CI)F" /T
  • Restart the SQL Server service via services.msc or net stop MSSQLSERVER && net start MSSQLSERVER after applying permissions.

Step 3: Run Database Consistency Checks

  • Execute DBCC CHECKDB (YourDatabaseName) WITH ALL_ERRORMSGS, NO_INFOMSGS; to detect broader corruption beyond the single FILESTREAM entry.
  • If DBCC reports FILESTREAM-specific allocation errors, note the repair level suggested (usually REPAIR_ALLOW_DATA_LOSS) only as a last resort.
  • For production systems, isolate the corrupted FILESTREAM BLOB by querying the affected table rather than repairing immediately, to avoid unnecessary data loss.

Step 4: Restore from a Known Good Backup

  • If the GUID file cannot be recovered or recreated, perform a restore using a verified full backup that includes FILESTREAM data: RESTORE DATABASE YourDatabaseName FROM DISK = 'E:\Backups\YourDatabase.bak' WITH FILESTREAM (DIRECTORY_NAME = 'YourFilestreamDirectory'), RECOVERY;
  • Confirm the backup media was taken after FILESTREAM was enabled and includes the full filestream container, not just the primary data file.

Alternative or Verification Steps

  • After applying fixes, re-run the triggering query or application process that calls the FILESTREAM data; confirm Error 5552 no longer appears in the SQL Server Error Log (EXEC xp_readerrorlog 0, 1;).
  • If the issue persists and no backup is available, consider exporting accessible FILESTREAM BLOBs via OPENROWSET(BULK...) to a new table before dropping and recreating the FILESTREAM filegroup entirely.