% /opt/GEMSnewdb/4.2.52.2/bin/db_recover -v
db_recover: Finding last valid log LSN: file: 2 offset 531423
db_recover: Recovery starting from [1][28]
db_recover: Log sequence error: page LSN 1 13165; previous LSN 644 470583
db_recover: Recovery function for LSN 1 12926 failed on forward pass
db_recover: PANIC: Invalid argument
db_recover: PANIC: fatal region error detected; run recovery
[... repeats many times ...]
db_recover: DB_ENV->open: DB_RUNRECOVERY: Fatal error, run database recovery