|Component:||Microsoft Exchange Extensible Storage Engine|
|Message:||<process name> (<process id>) <storage group name>Unable to write to section 5 while flushing logfile <file name>. Error <error code>.|
This is an unexpected error that usually occurs during runtime and may indicate that the log drive failed.
Check the system event log for any indications of hardware problems. A restore may be required if the problem is media failure.