Level 23: Fatal Error: Database Integrity Suspect

Error messages with severity level 23 indicate that the integrity of the entire database is suspect due to previous damage caused by a software or hardware problem. Restart SAP ASE and run dbcc diagnostics.

Even when a level 23 error indicates that the entire database is suspect, the damage may be confined to the cache, and the disk itself may be fine. If so, restarting SAP ASE with startserver fixes the problem.