{process name} ({process id}) Unable to read the header of database {name}. Error {error code}. The database may have been moved and therefore may no longer be located where the logs expect it to be.

Details
Product:	Exchange
Event ID:	420
Source:	ESE98
Version:	6.0
Component:	Extensible Store Engine
Symbolic Name:	RESTORE_DATABASE_READ_HEADER_WARNING_ID
Message:	{process name} ({process id}) Unable to read the header of database {name}. Error {error code}. The database may have been moved and therefore may no longer be located where the logs expect it to be.

Explanation
During recovery of the database, data was missing or moved.

User Action
If performing a soft recovery, restore from backup media. If performing a hard recovery, refer to the backup set to determine the affected log files. If the corrupted log file is outside the backup set, remove the files outside the backup set and run restore again. If the corruption is contained in log files in the backup set, revert to a previous backup. The loss of data may occur. If the problem persists, contact Microsoft Product Support Services.