When a node does not respond to a ping packet, the Node Check Manager
logs information about the node name, date, and time in a history log.
In addition, if an individual node failed during this ping session,
a check appears next to its name in the history column. In the
Node Check Manager's View menu, you can:
View the history of an individual machine for the current session by
highlighting that machine on the node list and selecting
Node History.
View the history of all machines for all sessions by selecting
History Log.
Remove the history file by selecting Remove History Log.