How to fix Error 5262 on Windows Server 2025 / Windows 11

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Troubleshooting Guide: SQL Server Error 5262 – “Object ID %d”

Why This Error Happens

Error 5262 in Microsoft SQL Server 2025 typically occurs when the database engine encounters a corrupted or inconsistent page structure linked to a specific Object ID, often due to allocation metadata mismatches in system catalog views. This can result from improper shutdowns, storage-level corruption, or incomplete transactions during DDL operations that left orphaned allocation units. In some cases, it is triggered by antivirus or backup software locking database files during read/write operations, causing the storage engine to misread page headers.

Step-by-Step Resolution Guide

Step 1: Verify Database Integrity

  • Open SQL Server Management Studio (SSMS) and connect to the affected instance.
  • Run DBCC CHECKDB ('YourDatabaseName') WITH NO_INFOMSGS, ALL_ERRORMSGS; to identify the scope of corruption tied to the reported Object ID.
  • Note the specific Object ID and associated index/table name returned in the output for cross-referencing.

Step 2: Isolate and Repair the Affected Object

  • If DBCC CHECKDB confirms corruption, attempt a targeted repair using DBCC CHECKTABLE ('TableName') WITH REPAIR_REBUILD; on the specific object first (avoid REPAIR_ALLOW_DATA_LOSS unless necessary).
  • Check the SQL Server error log located at C:\Program Files\Microsoft SQL Server\MSSQL17.MSSQLSERVER\MSSQL\Log\ERRORLOG for correlating I/O warnings (Error 823 or 824) that may point to underlying disk issues.
  • If disk-level issues are suspected, run chkdsk C: /f /r on the Windows Server 2025 volume hosting the .mdf/.ldf files (requires a reboot if the volume is in use).

Step 3: Restore from a Clean Backup (If Repair Fails)

  • If repair commands fail or report unresolvable corruption, restore the database from the last known good backup using RESTORE DATABASE YourDatabaseName FROM DISK = 'D:\Backups\YourDatabaseName.bak' WITH REPLACE;.
  • Ensure the SQL Server service account has read/write permissions on the backup directory (D:\Backups) via Windows Security tab properties.
  • Apply transaction log backups sequentially if using a full recovery model to minimize data loss.

Alternative or Verification Steps

  • After remediation, re-run DBCC CHECKDB ('YourDatabaseName') WITH NO_INFOMSGS; and confirm zero allocation or consistency errors are returned for the previously flagged Object ID.
  • If the error recurs intermittently, check Windows Event Viewer (Windows Logs > System) for Disk or NTFS warnings, as this often indicates a failing physical drive rather than a SQL Server configuration issue.