How to fix Error 3263 on Windows Server 2025 / Windows 11

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Troubleshooting Guide: SQL Server Error 3263 – Cannot Use Volume as Continuation Volume

Why This Error Happens

This error occurs when SQL Server attempts to continue a backup or restore operation across multiple volumes (tapes, disk files, or backup devices) but detects that the volume inserted does not match the expected sequence number or media family for the current media set. This typically happens due to incorrect volume ordering, a mismatched or corrupted backup media header, or when a backup file from a different media set/family is mistakenly substituted mid-operation. It can also occur if backup files were manually renamed, moved, or if a multi-file backup striping configuration was altered after the backup set was initiated.

Step-by-Step Resolution Guide

Step 1: Verify the Correct Volume Sequence

  • Check the original backup command or script to confirm the exact order of backup devices/files used (e.g., BACKUP DATABASE ... TO DISK = 'File1.bak', DISK = 'File2.bak').
  • Run RESTORE LABELONLY FROM DISK = 'Path\File.bak' to inspect the media set, family sequence number, and volume ID stored in the header.
  • Ensure the volume you are inserting matches the FamilySequenceNumber and MediaSequenceNumber expected by SQL Server.

Step 2: Confirm File Integrity and Correct Media Family

  • Navigate to the backup directory, typically C:\Program Files\Microsoft SQL Server\MSSQL17.MSSQLSERVER\MSSQL\Backup\, and verify all striped backup files are present and untouched.
  • Use RESTORE VERIFYONLY FROM DISK = 'Path\File1.bak', DISK = 'Path\File2.bak' to validate the entire media set as a whole, not just a single file.
  • If any file was renamed or copied from a different backup job, restore using the original, unaltered files instead.

Step 3: Reissue the Restore or Backup Command with Correct Volume Order

  • Reconstruct the RESTORE DATABASE or BACKUP DATABASE statement, explicitly listing all DISK = or TAPE = entries in their original creation order.
  • Example:
  RESTORE DATABASE [YourDB]
  FROM DISK = 'D:\Backups\File1.bak',
       DISK = 'D:\Backups\File2.bak'
  WITH FILE = 1;
  • If using tape devices, ensure the correct physical tape is loaded and that the tape drive is not reporting a different volume ID.

Step 4: Restart the Backup/Restore Job with a Fresh Media Set

  • If the media set is irreparably mismatched, initiate a brand-new backup set using WITH FORMAT to avoid contaminated sequence metadata.
  • Update any SQL Server Agent Job steps or maintenance plans referencing the old file paths to point to the newly created backup set.
  • Restart the SQL Server Agent service via Services.msc on Windows Server 2025 if the job scheduler cached old device metadata.

Alternative or Verification Steps

  • Run RESTORE HEADERONLY FROM DISK = 'Path\File.bak' after applying the fix to confirm the MediaSequenceNumber and FamilyCount align correctly before attempting a full restore.
  • If the issue persists across multiple attempts, consider migrating the backup strategy to a single consolidated .bak file (non-striped) to eliminate multi-volume sequencing errors entirely.