Gap in data after System event

[ironhalo]

We had an event on our splunk server, and there's a gap in some of the logs. The logs are continually written to on a daily basis, I'm not sure why splunk is not parsing the missing data. How can I get the missing data back in without manually adding it?

[cvajs]

copy out the data into a new file, then index that file into the same index, etc.