HighAvailability:ResettoGood·Chapter11 285 Solutions Fast Track Understanding High Availability High availability is a mechanism to reduce or eliminate downtime. Planned downtime is scheduled in advance. High availability can frequently provide for zero downtime in these circumstances. Unplanned downtime is not scheduled in advance and is frequently the result of a system failure or compromise. High availability can frequently minimize this downtime by automatically identifying the failure and bringing impacted virtual machines back online. Reset to Good Reset to good is the ability to reset an environment to a good, functional state as quickly as possible. Reset to good can be accomplished using vendor tools such as VMware HA