Seaquel
SQL Server error code

SQL Server error 3284

SQL Server raises error 3284 at severity 16, which marks a problem with the query or data that you can correct.

Filemark on device '%ls' is not aligned. Re-issue the Restore statement with the same blocksize used to create the backupset: '%d' looks like a possible value.
Msg3284
Severity16
Group3000–3999

Source: Database Engine events and errors