System Administration Guide
Chapter 2, Administering filesystems

Missing or corrupted database files

Missing or corrupted database files

The Details may indicate file data (or the file itself) is missing, as in these examples: 



mnt: cannot open /etc/default/filesys
The file /etc/default/filesys is missing. Restore it from backups. 

Failed to remove export configuration for filesystem - the object instance filesystem does not exist
The file /etc/exports is missing. Restore it from backups. 

Failed to remove mount configuration for filesystem
The file /etc/default/filesys is missing. Restore it from backups.