How to fix Error 4344 on Windows Server 2025 / Windows 11

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Troubleshooting Guide: Error 4344 – RESTORE PAGE Not Allowed on Read-Only Databases or Filegroups

Why This Error Happens

This error occurs because SQL Server 2025 does not permit page-level restores on databases or filegroups that are currently marked as read-only, since page restores require write access to apply transaction log changes to the target page. The issue typically arises when the database (or the specific filegroup containing the damaged page) has been explicitly set to READ_ONLY, or when the database is part of an Availability Group secondary replica that enforces read-only access. Additionally, this can happen if the filegroup was set to read-only during a data archival process and the DBA forgot to revert it before attempting a page-level repair.

Step-by-Step Resolution Guide

Step 1: Identify the Read-Only Status of the Database or Filegroup

  • Open SQL Server Management Studio (SSMS) or a query window connected to the instance.
  • Run the following query to check the database state:
  SELECT name, is_read_only FROM sys.databases WHERE name = 'YourDatabaseName';
  • Run this query to check filegroup-level read-only status:
  SELECT name, is_read_only FROM sys.filegroups;

Step 2: Change the Database or Filegroup to Read-Write Mode

  • If the entire database is read-only, switch it to read-write mode using:
  ALTER DATABASE YourDatabaseName SET READ_WRITE WITH ROLLBACK IMMEDIATE;
  • If only a specific filegroup is read-only, alter just that filegroup:
  ALTER DATABASE YourDatabaseName MODIFY FILEGROUP YourFileGroupName READWRITE;
  • Ensure no active user connections are blocking this change; use WITH ROLLBACK IMMEDIATE to force disconnect if necessary.

Step 3: Perform the RESTORE PAGE Operation

  • Once the database or filegroup is writable, retry the page restore command:
  RESTORE DATABASE YourDatabaseName PAGE='1:57890' FROM DISK = 'C:\Backups\YourBackupFile.bak';
  • Follow this with a transaction log restore to bring the page up to date:
  RESTORE LOG YourDatabaseName FROM DISK = 'C:\Backups\YourLogBackup.trn';

Step 4: Revert the Filegroup or Database to Read-Only (If Required)

  • If the read-only state was intentional (e.g., for an archival filegroup), set it back after the restore completes:
  ALTER DATABASE YourDatabaseName MODIFY FILEGROUP YourFileGroupName READONLY;
  • Confirm no other maintenance jobs depend on the temporary read-write window before reverting.

Alternative or Verification Steps

  • Verify the restore succeeded by querying msdb.dbo.suspect_pages to ensure the previously corrupted page is no longer listed.
  • If the database belongs to an Always On Availability Group, perform the page restore on the primary replica directly, since secondary replicas are always read-only and will continue to throw Error 4344 regardless of filegroup settings.